153561021056 has 32 divisors (see below), whose sum is σ = 306174031380. Its totient is φ = 76717342720.

The previous prime is 153561021041. The next prime is 153561021073. The reversal of 153561021056 is 650120165351.

It can be written as a sum of positive squares in 2 ways, for example, as 153381889600 + 179131456 = 391640^2 + 13384^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×153561021056² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337115 + ... + 648666.

Almost surely, 2^153561021056 is an apocalyptic number.

153561021056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

153561021056 is a deficient number, since it is larger than the sum of its proper divisors (152613010324).

153561021056 is an equidigital number, since it uses as much as digits as its factorization.

153561021056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987012 (or 987000 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 153561021056 in words is "one hundred fifty-three billion, five hundred sixty-one million, twenty-one thousand, fifty-six".