64156380168 has 32 divisors (see below), whose sum is σ = 160419692160. Its totient is φ = 21381627840.

The previous prime is 64156380161. The next prime is 64156380187. The reversal of 64156380168 is 86108365146.

It is a super-2 number, since 2×64156380168² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64156380161) 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 7 ways as a sum of consecutive naturals, for example, 101163 + ... + 372218.

It is an arithmetic number, because the mean of its divisors is an integer number (5013115380).

Almost surely, 2^64156380168 is an apocalyptic number.

It is an amenable number.

64156380168 is an abundant number, since it is smaller than the sum of its proper divisors (96263311992).

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

64156380168 is a wasteful number, since it uses less digits than its factorization.

64156380168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479037 (or 479033 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 64156380168 in words is "sixty-four billion, one hundred fifty-six million, three hundred eighty thousand, one hundred sixty-eight".