648061581392 has 40 divisors (see below), whose sum is σ = 1260627802752. Its totient is φ = 322739164800.

The previous prime is 648061581389. The next prime is 648061581421. The reversal of 648061581392 is 293185160846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12343517 + ... + 12395907.

Almost surely, 2^648061581392 is an apocalyptic number.

It is an amenable number.

648061581392 is a deficient number, since it is larger than the sum of its proper divisors (612566221360).

648061581392 is a wasteful number, since it uses less digits than its factorization.

648061581392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55467 (or 55461 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 648061581392 in words is "six hundred forty-eight billion, sixty-one million, five hundred eighty-one thousand, three hundred ninety-two".