65651560993631 has 2 divisors, whose sum is σ = 65651560993632. Its totient is φ = 65651560993630.

The previous prime is 65651560993583. The next prime is 65651560993633. The reversal of 65651560993631 is 13639906515656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65651560993631 is a prime.

It is a super-2 number, since 2×65651560993631² (a number of 28 digits) contains 22 as substring.

Together with 65651560993633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65651560993633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32825780496815 + 32825780496816.

It is an arithmetic number, because the mean of its divisors is an integer number (32825780496816).

Almost surely, 2^{65651560993631} is an apocalyptic number.

65651560993631 is a deficient number, since it is larger than the sum of its proper divisors (1).

65651560993631 is an equidigital number, since it uses as much as digits as its factorization.

65651560993631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098000, while the sum is 65.

The spelling of 65651560993631 in words is "sixty-five trillion, six hundred fifty-one billion, five hundred sixty million, nine hundred ninety-three thousand, six hundred thirty-one".