1156167918 has 80 divisors (see below), whose sum is σ = 2665087920. Its totient is φ = 374419584.

The previous prime is 1156167913. The next prime is 1156167919. The reversal of 1156167918 is 8197616511.

1156167918 is a `hidden beast` number, since 1 + 1 + 561 + 6 + 79 + 18 = 666.

It is a super-2 number, since 2×1156167918² = 2673448509224909448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156167913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1873546 + ... + 1874162.

It is an arithmetic number, because the mean of its divisors is an integer number (33313599).

Almost surely, 2^1156167918 is an apocalyptic number.

1156167918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156167918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332543960).

1156167918 is an abundant number, since it is smaller than the sum of its proper divisors (1508920002).

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

1156167918 is a wasteful number, since it uses less digits than its factorization.

1156167918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943 (or 934 counting only the distinct ones).

The product of its digits is 90720, while the sum is 45.

The square root of 1156167918 is about 34002.4692926852. The cubic root of 1156167918 is about 1049.5592762624.

The spelling of 1156167918 in words is "one billion, one hundred fifty-six million, one hundred sixty-seven thousand, nine hundred eighteen".