64513572986 has 8 divisors (see below), whose sum is σ = 102462733620. Its totient is φ = 30359328448.

The previous prime is 64513572973. The next prime is 64513573001. The reversal of 64513572986 is 68927531546.

It can be written as a sum of positive squares in 2 ways, for example, as 52420392025 + 12093180961 = 228955^2 + 109969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 948728981 + ... + 948729048.

Almost surely, 2^64513572986 is an apocalyptic number.

64513572986 is a deficient number, since it is larger than the sum of its proper divisors (37949160634).

64513572986 is a wasteful number, since it uses less digits than its factorization.

64513572986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897458048.

The product of its digits is 10886400, while the sum is 56.

The spelling of 64513572986 in words is "sixty-four billion, five hundred thirteen million, five hundred seventy-two thousand, nine hundred eighty-six".