51616656610499 has 2 divisors, whose sum is σ = 51616656610500. Its totient is φ = 51616656610498.

The previous prime is 51616656610489. The next prime is 51616656610523. The reversal of 51616656610499 is 99401665661615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51616656610499 - 2⁴ = 51616656610483 is a prime.

It is not a weakly prime, because it can be changed into another prime (51616656610489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25808328305249 + 25808328305250.

It is an arithmetic number, because the mean of its divisors is an integer number (25808328305250).

Almost surely, 2^{51616656610499} is an apocalyptic number.

51616656610499 is a deficient number, since it is larger than the sum of its proper divisors (1).

51616656610499 is an equidigital number, since it uses as much as digits as its factorization.

51616656610499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62985600, while the sum is 65.

The spelling of 51616656610499 in words is "fifty-one trillion, six hundred sixteen billion, six hundred fifty-six million, six hundred ten thousand, four hundred ninety-nine".