56615761 has 2 divisors, whose sum is σ = 56615762. Its totient is φ = 56615760.

The previous prime is 56615723. The next prime is 56615791. The reversal of 56615761 is 16751665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33872400 + 22743361 = 5820^2 + 4769^2 .

It is a cyclic number.

It is not a de Polignac number, because 56615761 - 2²⁵ = 23061329 is a prime.

It is a super-3 number, since 3×56615761³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56615761.

It is not a weakly prime, because it can be changed into another prime (56615791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28307880 + 28307881.

It is an arithmetic number, because the mean of its divisors is an integer number (28307881).

Almost surely, 2^56615761 is an apocalyptic number.

It is an amenable number.

56615761 is a deficient number, since it is larger than the sum of its proper divisors (1).

56615761 is an equidigital number, since it uses as much as digits as its factorization.

56615761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 37.

The square root of 56615761 is about 7524.3445561723. The cubic root of 56615761 is about 383.9833999805.

The spelling of 56615761 in words is "fifty-six million, six hundred fifteen thousand, seven hundred sixty-one".