56621975770554 has 32 divisors (see below), whose sum is σ = 114164559323136. Its totient is φ = 18720632614320.

The previous prime is 56621975770553. The next prime is 56621975770561. The reversal of 56621975770554 is 45507757912665.

It is a super-2 number, since 2×56621975770554² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56621975770553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6405492 + ... + 12420719.

It is an arithmetic number, because the mean of its divisors is an integer number (3567642478848).

Almost surely, 2^{56621975770554} is an apocalyptic number.

56621975770554 is an abundant number, since it is smaller than the sum of its proper divisors (57542583552582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56621975770554 is a wasteful number, since it uses less digits than its factorization.

56621975770554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18830290.

The product of its (nonzero) digits is 555660000, while the sum is 69.

The spelling of 56621975770554 in words is "fifty-six trillion, six hundred twenty-one billion, nine hundred seventy-five million, seven hundred seventy thousand, five hundred fifty-four".