156564513081 has 12 divisors (see below), whose sum is σ = 226153807152. Its totient is φ = 104374003896.

The previous prime is 156564513067. The next prime is 156564513139. The reversal of 156564513081 is 180315465651.

It is a happy number.

156564513081 is a `hidden beast` number, since 1 + 5 + 6 + 56 + 4 + 513 + 0 + 81 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-156564513081 is a prime.

It is a super-3 number, since 3×156564513081³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (156564512081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293710 + ... + 631976.

It is an arithmetic number, because the mean of its divisors is an integer number (18846150596).

Almost surely, 2^156564513081 is an apocalyptic number.

It is an amenable number.

156564513081 is a deficient number, since it is larger than the sum of its proper divisors (69589294071).

156564513081 is a wasteful number, since it uses less digits than its factorization.

156564513081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389700 (or 389697 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 156564513081 in words is "one hundred fifty-six billion, five hundred sixty-four million, five hundred thirteen thousand, eighty-one".