65731402769 has 2 divisors, whose sum is σ = 65731402770. Its totient is φ = 65731402768.

The previous prime is 65731402691. The next prime is 65731402787. The reversal of 65731402769 is 96720413756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36349329025 + 29382073744 = 190655^2 + 171412^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65731402769 is a prime.

It is a super-2 number, since 2×65731402769² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65731402669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32865701384 + 32865701385.

It is an arithmetic number, because the mean of its divisors is an integer number (32865701385).

Almost surely, 2^65731402769 is an apocalyptic number.

It is an amenable number.

65731402769 is a deficient number, since it is larger than the sum of its proper divisors (1).

65731402769 is an equidigital number, since it uses as much as digits as its factorization.

65731402769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 50.

The spelling of 65731402769 in words is "sixty-five billion, seven hundred thirty-one million, four hundred two thousand, seven hundred sixty-nine".