65731402691 has 2 divisors, whose sum is σ = 65731402692. Its totient is φ = 65731402690.

The previous prime is 65731402669. The next prime is 65731402769. The reversal of 65731402691 is 19620413756.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65731402691 - 2¹⁴ = 65731386307 is a prime.

It is not a weakly prime, because it can be changed into another prime (65731402601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32865701345 + 32865701346.

It is an arithmetic number, because the mean of its divisors is an integer number (32865701346).

Almost surely, 2^65731402691 is an apocalyptic number.

65731402691 is a deficient number, since it is larger than the sum of its proper divisors (1).

65731402691 is an equidigital number, since it uses as much as digits as its factorization.

65731402691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 65731402691 in words is "sixty-five billion, seven hundred thirty-one million, four hundred two thousand, six hundred ninety-one".