64431615502612 has 6 divisors (see below), whose sum is σ = 112755327129578. Its totient is φ = 32215807751304.

The previous prime is 64431615502577. The next prime is 64431615502621. The reversal of 64431615502612 is 21620551613446.

It can be written as a sum of positive squares in only one way, i.e., 54615588135696 + 9816027366916 = 7390236^2 + 3133054^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8053951937823 + ... + 8053951937830.

Almost surely, 2^{64431615502612} is an apocalyptic number.

It is an amenable number.

64431615502612 is a deficient number, since it is larger than the sum of its proper divisors (48323711626966).

64431615502612 is a wasteful number, since it uses less digits than its factorization.

64431615502612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16107903875657 (or 16107903875655 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 64431615502612 in words is "sixty-four trillion, four hundred thirty-one billion, six hundred fifteen million, five hundred two thousand, six hundred twelve".