56121262451 has 2 divisors, whose sum is σ = 56121262452. Its totient is φ = 56121262450.

The previous prime is 56121262361. The next prime is 56121262471. The reversal of 56121262451 is 15426212165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56121262451 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (56121262471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28060631225 + 28060631226.

It is an arithmetic number, because the mean of its divisors is an integer number (28060631226).

Almost surely, 2^56121262451 is an apocalyptic number.

56121262451 is a deficient number, since it is larger than the sum of its proper divisors (1).

56121262451 is an equidigital number, since it uses as much as digits as its factorization.

56121262451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 35.

The spelling of 56121262451 in words is "fifty-six billion, one hundred twenty-one million, two hundred sixty-two thousand, four hundred fifty-one".