18616876651 has 2 divisors, whose sum is σ = 18616876652. Its totient is φ = 18616876650.

The previous prime is 18616876643. The next prime is 18616876661. The reversal of 18616876651 is 15667861681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18616876651 - 2³ = 18616876643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18616876592 and 18616876601.

It is not a weakly prime, because it can be changed into another prime (18616876661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9308438325 + 9308438326.

It is an arithmetic number, because the mean of its divisors is an integer number (9308438326).

Almost surely, 2^18616876651 is an apocalyptic number.

18616876651 is a deficient number, since it is larger than the sum of its proper divisors (1).

18616876651 is an equidigital number, since it uses as much as digits as its factorization.

18616876651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 55.

The spelling of 18616876651 in words is "eighteen billion, six hundred sixteen million, eight hundred seventy-six thousand, six hundred fifty-one".