387320105646 has 32 divisors (see below), whose sum is σ = 861109898400. Its totient is φ = 129046919040.

The previous prime is 387320105587. The next prime is 387320105687. The reversal of 387320105646 is 646501023783.

387320105646 is a `hidden beast` number, since 3 + 8 + 73 + 2 + 0 + 10 + 564 + 6 = 666.

It is a super-3 number, since 3×387320105646³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1542861 + ... + 1776248.

It is an arithmetic number, because the mean of its divisors is an integer number (26909684325).

Almost surely, 2^387320105646 is an apocalyptic number.

387320105646 is an abundant number, since it is smaller than the sum of its proper divisors (473789792754).

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

387320105646 is a wasteful number, since it uses less digits than its factorization.

387320105646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321281 (or 3321275 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 387320105646 in words is "three hundred eighty-seven billion, three hundred twenty million, one hundred five thousand, six hundred forty-six".