56906058821 has 2 divisors, whose sum is σ = 56906058822. Its totient is φ = 56906058820.

The previous prime is 56906058817. The next prime is 56906058863. The reversal of 56906058821 is 12885060965.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56745909796 + 160149025 = 238214^2 + 12655^2 .

It is a cyclic number.

It is not a de Polignac number, because 56906058821 - 2² = 56906058817 is a prime.

It is a super-2 number, since 2×56906058821² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56906058821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56906018821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28453029410 + 28453029411.

It is an arithmetic number, because the mean of its divisors is an integer number (28453029411).

Almost surely, 2^56906058821 is an apocalyptic number.

It is an amenable number.

56906058821 is a deficient number, since it is larger than the sum of its proper divisors (1).

56906058821 is an equidigital number, since it uses as much as digits as its factorization.

56906058821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 56906058821 in words is "fifty-six billion, nine hundred six million, fifty-eight thousand, eight hundred twenty-one".