56615056639 has 2 divisors, whose sum is σ = 56615056640. Its totient is φ = 56615056638.

The previous prime is 56615056571. The next prime is 56615056661. The reversal of 56615056639 is 93665051665.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56615056639 - 2¹³ = 56615048447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56615051639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28307528319 + 28307528320.

It is an arithmetic number, because the mean of its divisors is an integer number (28307528320).

Almost surely, 2^56615056639 is an apocalyptic number.

56615056639 is a deficient number, since it is larger than the sum of its proper divisors (1).

56615056639 is an equidigital number, since it uses as much as digits as its factorization.

56615056639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374000, while the sum is 52.

The spelling of 56615056639 in words is "fifty-six billion, six hundred fifteen million, fifty-six thousand, six hundred thirty-nine".