648494317126631 has 2 divisors, whose sum is σ = 648494317126632. Its totient is φ = 648494317126630.

The previous prime is 648494317126609. The next prime is 648494317126657. The reversal of 648494317126631 is 136621713494846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648494317126631 - 2¹⁴ = 648494317110247 is a prime.

It is a super-2 number, since 2×648494317126631² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648494317146631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324247158563315 + 324247158563316.

It is an arithmetic number, because the mean of its divisors is an integer number (324247158563316).

Almost surely, 2^{648494317126631} is an apocalyptic number.

648494317126631 is a deficient number, since it is larger than the sum of its proper divisors (1).

648494317126631 is an equidigital number, since it uses as much as digits as its factorization.

648494317126631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 125411328, while the sum is 65.

The spelling of 648494317126631 in words is "six hundred forty-eight trillion, four hundred ninety-four billion, three hundred seventeen million, one hundred twenty-six thousand, six hundred thirty-one".