64888856951044 has 81 divisors (see below), whose sum is σ = 135248702779701. Its totient is φ = 27160747377120.

The previous prime is 64888856951021. The next prime is 64888856951063. The reversal of 64888856951044 is 44015965888846.

The square root of 64888856951044 is 8055362.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7900248104644 + 56988608846400 = 2810738^2 + 7549080^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4849321234 + ... + 4849334614.

Almost surely, 2^{64888856951044} is an apocalyptic number.

64888856951044 is the 8055362-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64888856951044

64888856951044 is an abundant number, since it is smaller than the sum of its proper divisors (70359845828657).

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

64888856951044 is an frugal number, since it uses more digits than its factorization.

64888856951044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26866 (or 13433 counting only the distinct ones).

The product of its (nonzero) digits is 2123366400, while the sum is 76.

The spelling of 64888856951044 in words is "sixty-four trillion, eight hundred eighty-eight billion, eight hundred fifty-six million, nine hundred fifty-one thousand, forty-four".