56616657604123 has 2 divisors, whose sum is σ = 56616657604124. Its totient is φ = 56616657604122.

The previous prime is 56616657604097. The next prime is 56616657604147. The reversal of 56616657604123 is 32140675661665.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56616657604123 is a prime.

It is not a weakly prime, because it can be changed into another prime (56616657604153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28308328802061 + 28308328802062.

It is an arithmetic number, because the mean of its divisors is an integer number (28308328802062).

Almost surely, 2^{56616657604123} is an apocalyptic number.

56616657604123 is a deficient number, since it is larger than the sum of its proper divisors (1).

56616657604123 is an equidigital number, since it uses as much as digits as its factorization.

56616657604123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32659200, while the sum is 58.

The spelling of 56616657604123 in words is "fifty-six trillion, six hundred sixteen billion, six hundred fifty-seven million, six hundred four thousand, one hundred twenty-three".