56121262361 has 2 divisors, whose sum is σ = 56121262362. Its totient is φ = 56121262360.

The previous prime is 56121262303. The next prime is 56121262451. The reversal of 56121262361 is 16326212165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50202883600 + 5918378761 = 224060^2 + 76931^2 .

It is a cyclic number.

It is not a de Polignac number, because 56121262361 - 2²⁶ = 56054153497 is a prime.

It is not a weakly prime, because it can be changed into another prime (56121292361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28060631180 + 28060631181.

It is an arithmetic number, because the mean of its divisors is an integer number (28060631181).

Almost surely, 2^56121262361 is an apocalyptic number.

It is an amenable number.

56121262361 is a deficient number, since it is larger than the sum of its proper divisors (1).

56121262361 is an equidigital number, since it uses as much as digits as its factorization.

56121262361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The spelling of 56121262361 in words is "fifty-six billion, one hundred twenty-one million, two hundred sixty-two thousand, three hundred sixty-one".