56554858021 has 8 divisors (see below), whose sum is σ = 57937685400. Its totient is φ = 55172194560.

The previous prime is 56554858013. The next prime is 56554858039. The reversal of 56554858021 is 12085845565.

It can be written as a sum of positive squares in 4 ways, for example, as 790396996 + 55764461025 = 28114^2 + 236145^2 .

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 56554858021 - 2³ = 56554858013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56554858121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 942135 + ... + 1000363.

It is an arithmetic number, because the mean of its divisors is an integer number (7242210675).

Almost surely, 2^56554858021 is an apocalyptic number.

It is an amenable number.

56554858021 is a deficient number, since it is larger than the sum of its proper divisors (1382827379).

56554858021 is a wasteful number, since it uses less digits than its factorization.

56554858021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81959.

The product of its (nonzero) digits is 1920000, while the sum is 49.

The spelling of 56554858021 in words is "fifty-six billion, five hundred fifty-four million, eight hundred fifty-eight thousand, twenty-one".