64156240161 has 64 divisors (see below), whose sum is σ = 108115795200. Its totient is φ = 37274038272.

The previous prime is 64156240153. The next prime is 64156240193. The reversal of 64156240161 is 16104265146.

64156240161 is a `hidden beast` number, since 6 + 4 + 15 + 624 + 0 + 16 + 1 = 666.

It is not a de Polignac number, because 64156240161 - 2³ = 64156240153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64156240111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1937601 + ... + 1970433.

It is an arithmetic number, because the mean of its divisors is an integer number (1689309300).

Almost surely, 2^64156240161 is an apocalyptic number.

It is an amenable number.

64156240161 is a deficient number, since it is larger than the sum of its proper divisors (43959555039).

64156240161 is a wasteful number, since it uses less digits than its factorization.

64156240161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33167 (or 33161 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 64156240161 in words is "sixty-four billion, one hundred fifty-six million, two hundred forty thousand, one hundred sixty-one".