381400515786 has 32 divisors (see below), whose sum is σ = 808076554560. Its totient is φ = 119595082496.

The previous prime is 381400515779. The next prime is 381400515841. The reversal of 381400515786 is 687515004183.

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, 732516 + ... + 1139903.

It is an arithmetic number, because the mean of its divisors is an integer number (25252392330).

Almost surely, 2^381400515786 is an apocalyptic number.

381400515786 is an abundant number, since it is smaller than the sum of its proper divisors (426676038774).

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

381400515786 is a wasteful number, since it uses less digits than its factorization.

381400515786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874438.

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 381400515786 in words is "three hundred eighty-one billion, four hundred million, five hundred fifteen thousand, seven hundred eighty-six".