649274442912 has 36 divisors (see below), whose sum is σ = 1846374197850. Its totient is φ = 216424814208.

The previous prime is 649274442899. The next prime is 649274442959. The reversal of 649274442912 is 219244472946.

649274442912 is a `hidden beast` number, since 6 + 49 + 2 + 74 + 442 + 91 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 530968712976 + 118305729936 = 728676^2 + 343956^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1127212287 + ... + 1127212862.

Almost surely, 2^649274442912 is an apocalyptic number.

It is an amenable number.

649274442912 is an abundant number, since it is smaller than the sum of its proper divisors (1197099754938).

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

649274442912 is a wasteful number, since it uses less digits than its factorization.

649274442912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2254425165 (or 2254425154 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The spelling of 649274442912 in words is "six hundred forty-nine billion, two hundred seventy-four million, four hundred forty-two thousand, nine hundred twelve".