386646615864 has 256 divisors, whose sum is σ = 1104803712000. Its totient is φ = 125254563840.

The previous prime is 386646615857. The next prime is 386646615923. The reversal of 386646615864 is 468516646683.

386646615864 is a `hidden beast` number, since 3 + 8 + 6 + 6 + 4 + 6 + 615 + 8 + 6 + 4 = 666.

386646615864 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 342467652 + ... + 342468780.

It is an arithmetic number, because the mean of its divisors is an integer number (4315639500).

Almost surely, 2^386646615864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 386646615864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552401856000).

386646615864 is an abundant number, since it is smaller than the sum of its proper divisors (718157096136).

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

386646615864 is a wasteful number, since it uses less digits than its factorization.

386646615864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515 (or 1505 counting only the distinct ones).

The product of its digits is 119439360, while the sum is 63.

The spelling of 386646615864 in words is "three hundred eighty-six billion, six hundred forty-six million, six hundred fifteen thousand, eight hundred sixty-four".