639054577 has 16 divisors (see below), whose sum is σ = 750701952. Its totient is φ = 532586880.

The previous prime is 639054571. The next prime is 639054587. The reversal of 639054577 is 775450936.

639054577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 639054577 - 2¹⁵ = 639021809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (639054571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84483 + ... + 91735.

It is an arithmetic number, because the mean of its divisors is an integer number (46918872).

Almost surely, 2^639054577 is an apocalyptic number.

It is an amenable number.

639054577 is a deficient number, since it is larger than the sum of its proper divisors (111647375).

639054577 is a wasteful number, since it uses less digits than its factorization.

639054577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7608.

The product of its (nonzero) digits is 793800, while the sum is 46.

The square root of 639054577 is about 25279.5288128557. The cubic root of 639054577 is about 861.3493227016.

It can be divided in two parts, 63 and 9054577, that added together give a triangular number (9054640 = T₄₂₅₅).

The spelling of 639054577 in words is "six hundred thirty-nine million, fifty-four thousand, five hundred seventy-seven".