649840934016 has 96 divisors (see below), whose sum is σ = 1870180123500. Its totient is φ = 216591040512.

The previous prime is 649840934003. The next prime is 649840934033. The reversal of 649840934016 is 610439048946.

It is a happy number.

649840934016 is a `hidden beast` number, since 64 + 98 + 4 + 0 + 93 + 401 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 616702372416 + 33138561600 = 785304^2 + 182040^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13857040 + ... + 13903856.

Almost surely, 2^649840934016 is an apocalyptic number.

It is an amenable number.

649840934016 is an abundant number, since it is smaller than the sum of its proper divisors (1220339189484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649840934016 is a wasteful number, since it uses less digits than its factorization.

649840934016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58886 (or 58871 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 649840934016 in words is "six hundred forty-nine billion, eight hundred forty million, nine hundred thirty-four thousand, sixteen".