156055420521 has 48 divisors (see below), whose sum is σ = 302652954240. Its totient is φ = 74831765760.

The previous prime is 156055420519. The next prime is 156055420537. The reversal of 156055420521 is 125024550651.

156055420521 is a `hidden beast` number, since 1 + 5 + 60 + 5 + 54 + 20 + 521 = 666.

It is not a de Polignac number, because 156055420521 - 2¹ = 156055420519 is a prime.

It is a super-2 number, since 2×156055420521² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156055420621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8652076 + ... + 8670093.

It is an arithmetic number, because the mean of its divisors is an integer number (6305269880).

Almost surely, 2^156055420521 is an apocalyptic number.

156055420521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

156055420521 is a deficient number, since it is larger than the sum of its proper divisors (146597533719).

156055420521 is a wasteful number, since it uses less digits than its factorization.

156055420521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17322206 (or 17322203 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 156055420521 in words is "one hundred fifty-six billion, fifty-five million, four hundred twenty thousand, five hundred twenty-one".