56021533507969 has 2 divisors, whose sum is σ = 56021533507970. Its totient is φ = 56021533507968.

The previous prime is 56021533507967. The next prime is 56021533507999. The reversal of 56021533507969 is 96970533512065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38125993890625 + 17895539617344 = 6174625^2 + 4230312^2 .

It is a cyclic number.

It is not a de Polignac number, because 56021533507969 - 2¹ = 56021533507967 is a prime.

It is a super-2 number, since 2×56021533507969² (a number of 28 digits) contains 22 as substring.

Together with 56021533507967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56021533507967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28010766753984 + 28010766753985.

It is an arithmetic number, because the mean of its divisors is an integer number (28010766753985).

Almost surely, 2^{56021533507969} is an apocalyptic number.

It is an amenable number.

56021533507969 is a deficient number, since it is larger than the sum of its proper divisors (1).

56021533507969 is an equidigital number, since it uses as much as digits as its factorization.

56021533507969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927000, while the sum is 61.

The spelling of 56021533507969 in words is "fifty-six trillion, twenty-one billion, five hundred thirty-three million, five hundred seven thousand, nine hundred sixty-nine".