64877439412 has 12 divisors (see below), whose sum is σ = 113537353860. Its totient is φ = 32438195456.

The previous prime is 64877439401. The next prime is 64877439427. The reversal of 64877439412 is 21493477846.

It can be written as a sum of positive squares in 2 ways, for example, as 8957486736 + 55919952676 = 94644^2 + 236474^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319428 + ... + 481444.

It is an arithmetic number, because the mean of its divisors is an integer number (9461446155).

Almost surely, 2^64877439412 is an apocalyptic number.

It is an amenable number.

64877439412 is a deficient number, since it is larger than the sum of its proper divisors (48659914448).

64877439412 is a wasteful number, since it uses less digits than its factorization.

64877439412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262130 (or 262128 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 55.

The spelling of 64877439412 in words is "sixty-four billion, eight hundred seventy-seven million, four hundred thirty-nine thousand, four hundred twelve".