56720051501 has 2 divisors, whose sum is σ = 56720051502. Its totient is φ = 56720051500.

The previous prime is 56720051497. The next prime is 56720051513. The reversal of 56720051501 is 10515002765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45815262025 + 10904789476 = 214045^2 + 104426^2 .

It is a cyclic number.

It is not a de Polignac number, because 56720051501 - 2² = 56720051497 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56720251501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28360025750 + 28360025751.

It is an arithmetic number, because the mean of its divisors is an integer number (28360025751).

Almost surely, 2^56720051501 is an apocalyptic number.

It is an amenable number.

56720051501 is a deficient number, since it is larger than the sum of its proper divisors (1).

56720051501 is an equidigital number, since it uses as much as digits as its factorization.

56720051501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10500, while the sum is 32.

The spelling of 56720051501 in words is "fifty-six billion, seven hundred twenty million, fifty-one thousand, five hundred one".