56720277015637 has 2 divisors, whose sum is σ = 56720277015638. Its totient is φ = 56720277015636.

The previous prime is 56720277015557. The next prime is 56720277015643. The reversal of 56720277015637 is 73651077202765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28876017596881 + 27844259418756 = 5373641^2 + 5276766^2 .

It is a cyclic number.

It is not a de Polignac number, because 56720277015637 - 2¹⁵ = 56720276982869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56720277015667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28360138507818 + 28360138507819.

It is an arithmetic number, because the mean of its divisors is an integer number (28360138507819).

Almost surely, 2^{56720277015637} is an apocalyptic number.

It is an amenable number.

56720277015637 is a deficient number, since it is larger than the sum of its proper divisors (1).

56720277015637 is an equidigital number, since it uses as much as digits as its factorization.

56720277015637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25930800, while the sum is 58.

The spelling of 56720277015637 in words is "fifty-six trillion, seven hundred twenty billion, two hundred seventy-seven million, fifteen thousand, six hundred thirty-seven".