1056639168 has 140 divisors (see below), whose sum is σ = 3373363840. Its totient is φ = 325099008.

The previous prime is 1056639163. The next prime is 1056639173. The reversal of 1056639168 is 8619366501.

1056639168 is a `hidden beast` number, since 1 + 0 + 5 + 6 + 639 + 1 + 6 + 8 = 666.

1056639168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1056639163) and next prime (1056639173).

It is a super-2 number, since 2×1056639168² = 2232972662703464448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1056639163) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 59553 + ... + 75231.

It is an arithmetic number, because the mean of its divisors is an integer number (24095456).

Almost surely, 2^1056639168 is an apocalyptic number.

1056639168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1056639168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1686681920).

1056639168 is an abundant number, since it is smaller than the sum of its proper divisors (2316724672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1056639168 is a wasteful number, since it uses less digits than its factorization.

1056639168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15716 (or 15697 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1056639168 is about 32505.9866486160. The cubic root of 1056639168 is about 1018.5340880182.

The spelling of 1056639168 in words is "one billion, fifty-six million, six hundred thirty-nine thousand, one hundred sixty-eight".