638696161474 has 32 divisors (see below), whose sum is σ = 1156016563200. Its totient is φ = 258536765520.

The previous prime is 638696161459. The next prime is 638696161483. The reversal of 638696161474 is 474161696836.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3539014 + ... + 3715105.

It is an arithmetic number, because the mean of its divisors is an integer number (36125517600).

Almost surely, 2^638696161474 is an apocalyptic number.

638696161474 is a deficient number, since it is larger than the sum of its proper divisors (517320401726).

638696161474 is a wasteful number, since it uses less digits than its factorization.

638696161474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7254478.

The product of its digits is 31352832, while the sum is 61.

The spelling of 638696161474 in words is "six hundred thirty-eight billion, six hundred ninety-six million, one hundred sixty-one thousand, four hundred seventy-four".