557921639 has 4 divisors (see below), whose sum is σ = 608641800. Its totient is φ = 507201480.

The previous prime is 557921597. The next prime is 557921653. The reversal of 557921639 is 936129755.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 557921639 - 2⁸ = 557921383 is a prime.

It is a super-2 number, since 2×557921639² = 622553110528892642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 557921593 and 557921602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557921669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25360064 + ... + 25360085.

It is an arithmetic number, because the mean of its divisors is an integer number (152160450).

Almost surely, 2^557921639 is an apocalyptic number.

557921639 is a deficient number, since it is larger than the sum of its proper divisors (50720161).

557921639 is a wasteful number, since it uses less digits than its factorization.

557921639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50720160.

The product of its digits is 510300, while the sum is 47.

The square root of 557921639 is about 23620.3649209744. The cubic root of 557921639 is about 823.2360912580.

The spelling of 557921639 in words is "five hundred fifty-seven million, nine hundred twenty-one thousand, six hundred thirty-nine".