648941958944 has 12 divisors (see below), whose sum is σ = 1277604481734. Its totient is φ = 324470979456.

The previous prime is 648941958911. The next prime is 648941958967. The reversal of 648941958944 is 449859149846.

It can be written as a sum of positive squares in only one way, i.e., 425610102544 + 223331856400 = 652388^2 + 472580^2 .

It is a super-2 number, since 2×648941958944² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10139718077 + ... + 10139718140.

Almost surely, 2^648941958944 is an apocalyptic number.

It is an amenable number.

648941958944 is a deficient number, since it is larger than the sum of its proper divisors (628662522790).

648941958944 is a wasteful number, since it uses less digits than its factorization.

648941958944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20279436227 (or 20279436219 counting only the distinct ones).

The product of its digits is 358318080, while the sum is 71.

The spelling of 648941958944 in words is "six hundred forty-eight billion, nine hundred forty-one million, nine hundred fifty-eight thousand, nine hundred forty-four".