638427762577 has 8 divisors (see below), whose sum is σ = 696501103680. Its totient is φ = 580360163760.

The previous prime is 638427762547. The next prime is 638427762589. The reversal of 638427762577 is 775267724836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 638427762577 - 2⁷ = 638427762449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638427762547) 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 7 ways as a sum of consecutive naturals, for example, 1201438 + ... + 1649335.

It is an arithmetic number, because the mean of its divisors is an integer number (87062637960).

Almost surely, 2^638427762577 is an apocalyptic number.

It is an amenable number.

638427762577 is a deficient number, since it is larger than the sum of its proper divisors (58073341103).

638427762577 is a wasteful number, since it uses less digits than its factorization.

638427762577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871143.

The product of its digits is 165957120, while the sum is 64.

The spelling of 638427762577 in words is "six hundred thirty-eight billion, four hundred twenty-seven million, seven hundred sixty-two thousand, five hundred seventy-seven".