639874114554 has 16 divisors (see below), whose sum is σ = 1280010692448. Its totient is φ = 213247627632.

The previous prime is 639874114513. The next prime is 639874114591. The reversal of 639874114554 is 455411478936.

It is a junction number, because it is equal to n+sod(n) for n = 639874114494 and 639874114503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10904272 + ... + 10962795.

It is an arithmetic number, because the mean of its divisors is an integer number (80000668278).

Almost surely, 2^639874114554 is an apocalyptic number.

639874114554 is an abundant number, since it is smaller than the sum of its proper divisors (640136577894).

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

639874114554 is a wasteful number, since it uses less digits than its factorization.

639874114554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21871949.

The product of its digits is 14515200, while the sum is 57.

The spelling of 639874114554 in words is "six hundred thirty-nine billion, eight hundred seventy-four million, one hundred fourteen thousand, five hundred fifty-four".