381394534664 has 64 divisors (see below), whose sum is σ = 845486389440. Its totient is φ = 159006332160.

The previous prime is 381394534607. The next prime is 381394534687. The reversal of 381394534664 is 466435493183.

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, 882134 + ... + 1241349.

It is an arithmetic number, because the mean of its divisors is an integer number (13210724835).

Almost surely, 2^381394534664 is an apocalyptic number.

It is an amenable number.

381394534664 is an abundant number, since it is smaller than the sum of its proper divisors (464091854776).

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

381394534664 is a wasteful number, since it uses less digits than its factorization.

381394534664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123670 (or 2123666 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 56.

The spelling of 381394534664 in words is "three hundred eighty-one billion, three hundred ninety-four million, five hundred thirty-four thousand, six hundred sixty-four".