648494317126655 has 8 divisors (see below), whose sum is σ = 779221176832032. Its totient is φ = 518110122847968.

The previous prime is 648494317126631. The next prime is 648494317126657. The reversal of 648494317126655 is 556621713494846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 648494317126655 - 2³⁴ = 648477137257471 is a prime.

It is a super-2 number, since 2×648494317126655² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648494317126657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85666352507 + ... + 85666360076.

It is an arithmetic number, because the mean of its divisors is an integer number (97402647104004).

Almost surely, 2^{648494317126655} is an apocalyptic number.

648494317126655 is a deficient number, since it is larger than the sum of its proper divisors (130726859705377).

648494317126655 is a wasteful number, since it uses less digits than its factorization.

648494317126655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171332713345.

The product of its digits is 1045094400, while the sum is 71.

The spelling of 648494317126655 in words is "six hundred forty-eight trillion, four hundred ninety-four billion, three hundred seventeen million, one hundred twenty-six thousand, six hundred fifty-five".