1056553620 has 24 divisors (see below), whose sum is σ = 2958350304. Its totient is φ = 281747616.

The previous prime is 1056553613. The next prime is 1056553639. The reversal of 1056553620 is 263556501.

It is a super-2 number, since 2×1056553620² = 2232611103870208800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8804554 + ... + 8804673.

It is an arithmetic number, because the mean of its divisors is an integer number (123264596).

Almost surely, 2^1056553620 is an apocalyptic number.

1056553620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1056553620 is an abundant number, since it is smaller than the sum of its proper divisors (1901796684).

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

1056553620 is a wasteful number, since it uses less digits than its factorization.

1056553620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17609239 (or 17609237 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 1056553620 is about 32504.6707412950. The cubic root of 1056553620 is about 1018.5065996354.

The spelling of 1056553620 in words is "one billion, fifty-six million, five hundred fifty-three thousand, six hundred twenty".