381634705642 has 8 divisors (see below), whose sum is σ = 578119900932. Its totient is φ = 188928072000.

The previous prime is 381634705609. The next prime is 381634705657. The reversal of 381634705642 is 246507436183.

It can be written as a sum of positive squares in 2 ways, for example, as 260078580441 + 121556125201 = 509979^2 + 348649^2 .

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, 944640159 + ... + 944640562.

Almost surely, 2^381634705642 is an apocalyptic number.

381634705642 is a deficient number, since it is larger than the sum of its proper divisors (196485195290).

381634705642 is a wasteful number, since it uses less digits than its factorization.

381634705642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889280824.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 381634705642 in words is "three hundred eighty-one billion, six hundred thirty-four million, seven hundred five thousand, six hundred forty-two".