638842768214 has 32 divisors (see below), whose sum is σ = 1099523502336. Its totient is φ = 272699382240.

The previous prime is 638842768199. The next prime is 638842768241. The reversal of 638842768214 is 412867248836.

It is a Curzon number.

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, 10840649 + ... + 10899419.

It is an arithmetic number, because the mean of its divisors is an integer number (34360109448).

Almost surely, 2^638842768214 is an apocalyptic number.

638842768214 is a deficient number, since it is larger than the sum of its proper divisors (460680734122).

638842768214 is a wasteful number, since it uses less digits than its factorization.

638842768214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61860.

The product of its digits is 24772608, while the sum is 59.

The spelling of 638842768214 in words is "six hundred thirty-eight billion, eight hundred forty-two million, seven hundred sixty-eight thousand, two hundred fourteen".