64131028370844 has 24 divisors (see below), whose sum is σ = 157514806525440. Its totient is φ = 20251903695984.

The previous prime is 64131028370833. The next prime is 64131028370881. The reversal of 64131028370844 is 44807382013146.

64131028370844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64131028370844² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140638219884 + ... + 140638220339.

It is an arithmetic number, because the mean of its divisors is an integer number (6563116938560).

Almost surely, 2^{64131028370844} is an apocalyptic number.

It is an amenable number.

64131028370844 is an abundant number, since it is smaller than the sum of its proper divisors (93383778154596).

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

64131028370844 is a wasteful number, since it uses less digits than its factorization.

64131028370844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281276440249 (or 281276440247 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 51.

The spelling of 64131028370844 in words is "sixty-four trillion, one hundred thirty-one billion, twenty-eight million, three hundred seventy thousand, eight hundred forty-four".