56639769 has 8 divisors (see below), whose sum is σ = 75738720. Its totient is φ = 37650336.

The previous prime is 56639749. The next prime is 56639771. The reversal of 56639769 is 96793665.

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

It is not a de Polignac number, because 56639769 - 2¹⁹ = 56115481 is a prime.

It is a super-2 number, since 2×56639769² = 6416126864746722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56639749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26164 + ... + 28245.

It is an arithmetic number, because the mean of its divisors is an integer number (9467340).

Almost surely, 2^56639769 is an apocalyptic number.

It is an amenable number.

56639769 is a deficient number, since it is larger than the sum of its proper divisors (19098951).

56639769 is a wasteful number, since it uses less digits than its factorization.

56639769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54759.

The product of its digits is 1837080, while the sum is 51.

The square root of 56639769 is about 7525.9397419857. The cubic root of 56639769 is about 384.0376685595.

The spelling of 56639769 in words is "fifty-six million, six hundred thirty-nine thousand, seven hundred sixty-nine".