56621769 has 8 divisors (see below), whose sum is σ = 76775520. Its totient is φ = 37107936.

The previous prime is 56621753. The next prime is 56621771. The reversal of 56621769 is 96712665.

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

It is not a de Polignac number, because 56621769 - 2⁴ = 56621753 is a prime.

It is a super-2 number, since 2×56621769² = 6412049449378722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56621769.

It is not an unprimeable number, because it can be changed into a prime (56621069) 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, 159772 + ... + 160125.

It is an arithmetic number, because the mean of its divisors is an integer number (9596940).

Almost surely, 2^56621769 is an apocalyptic number.

56621769 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

56621769 is a deficient number, since it is larger than the sum of its proper divisors (20153751).

56621769 is a wasteful number, since it uses less digits than its factorization.

56621769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319959.

The product of its digits is 136080, while the sum is 42.

The square root of 56621769 is about 7524.7437830135. The cubic root of 56621769 is about 383.9969821269.

The spelling of 56621769 in words is "fifty-six million, six hundred twenty-one thousand, seven hundred sixty-nine".