61316664787523 has 2 divisors, whose sum is σ = 61316664787524. Its totient is φ = 61316664787522.

The previous prime is 61316664787519. The next prime is 61316664787549. The reversal of 61316664787523 is 32578746661316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61316664787523 - 2² = 61316664787519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61316664787523.

It is not a weakly prime, because it can be changed into another prime (61316664787513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30658332393761 + 30658332393762.

It is an arithmetic number, because the mean of its divisors is an integer number (30658332393762).

Almost surely, 2^{61316664787523} is an apocalyptic number.

61316664787523 is a deficient number, since it is larger than the sum of its proper divisors (1).

61316664787523 is an equidigital number, since it uses as much as digits as its factorization.

61316664787523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 182891520, while the sum is 65.

The spelling of 61316664787523 in words is "sixty-one trillion, three hundred sixteen billion, six hundred sixty-four million, seven hundred eighty-seven thousand, five hundred twenty-three".