638376547074 has 32 divisors (see below), whose sum is σ = 1459170118656. Its totient is φ = 182390333520.

The previous prime is 638376547051. The next prime is 638376547093. The reversal of 638376547074 is 470745673836.

It is a super-2 number, since 2×638376547074² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 638376546999 and 638376547017.

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, 4772899 + ... + 4904825.

It is an arithmetic number, because the mean of its divisors is an integer number (45599066208).

Almost surely, 2^638376547074 is an apocalyptic number.

638376547074 is an abundant number, since it is smaller than the sum of its proper divisors (820793571582).

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

638376547074 is a wasteful number, since it uses less digits than its factorization.

638376547074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247150.

The product of its (nonzero) digits is 71124480, while the sum is 60.

The spelling of 638376547074 in words is "six hundred thirty-eight billion, three hundred seventy-six million, five hundred forty-seven thousand, seventy-four".