64277966240972 has 96 divisors (see below), whose sum is σ = 129760508908800. Its totient is φ = 27553477881600.

The previous prime is 64277966240921. The next prime is 64277966241001. The reversal of 64277966240972 is 27904266977246.

It is a super-2 number, since 2×64277966240972² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64277966240896 and 64277966240905.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161281898 + ... + 161679950.

It is an arithmetic number, because the mean of its divisors is an integer number (1351671967800).

Almost surely, 2^{64277966240972} is an apocalyptic number.

It is an amenable number.

64277966240972 is an abundant number, since it is smaller than the sum of its proper divisors (65482542667828).

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

64277966240972 is a wasteful number, since it uses less digits than its factorization.

64277966240972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398967 (or 398965 counting only the distinct ones).

The product of its (nonzero) digits is 768144384, while the sum is 71.

The spelling of 64277966240972 in words is "sixty-four trillion, two hundred seventy-seven billion, nine hundred sixty-six million, two hundred forty thousand, nine hundred seventy-two".