56621176946651 has 2 divisors, whose sum is σ = 56621176946652. Its totient is φ = 56621176946650.

The previous prime is 56621176946627. The next prime is 56621176946683. The reversal of 56621176946651 is 15664967112665.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56621176946651 is a prime.

It is not a weakly prime, because it can be changed into another prime (56621176946951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28310588473325 + 28310588473326.

It is an arithmetic number, because the mean of its divisors is an integer number (28310588473326).

Almost surely, 2^{56621176946651} is an apocalyptic number.

56621176946651 is a deficient number, since it is larger than the sum of its proper divisors (1).

56621176946651 is an equidigital number, since it uses as much as digits as its factorization.

56621176946651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97977600, while the sum is 65.

The spelling of 56621176946651 in words is "fifty-six trillion, six hundred twenty-one billion, one hundred seventy-six million, nine hundred forty-six thousand, six hundred fifty-one".