638614054674 has 24 divisors (see below), whose sum is σ = 1384360220880. Its totient is φ = 212764207608.

The previous prime is 638614054651. The next prime is 638614054679. The reversal of 638614054674 is 476450416836.

638614054674 is a `hidden beast` number, since 6 + 3 + 86 + 14 + 0 + 546 + 7 + 4 = 666.

It is a super-3 number, since 3×638614054674³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 638614054674.

It is not an unprimeable number, because it can be changed into a prime (638614054679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8891904 + ... + 8963435.

It is an arithmetic number, because the mean of its divisors is an integer number (57681675870).

Almost surely, 2^638614054674 is an apocalyptic number.

638614054674 is an abundant number, since it is smaller than the sum of its proper divisors (745746166206).

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

638614054674 is a wasteful number, since it uses less digits than its factorization.

638614054674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17857334 (or 17857331 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 638614054674 in words is "six hundred thirty-eight billion, six hundred fourteen million, fifty-four thousand, six hundred seventy-four".