649715621274 has 12 divisors (see below), whose sum is σ = 1407717179466. Its totient is φ = 216571873752.

The previous prime is 649715621227. The next prime is 649715621327. The reversal of 649715621274 is 472126517946.

649715621274 is a `hidden beast` number, since 6 + 4 + 9 + 7 + 1 + 5 + 621 + 2 + 7 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 334438986249 + 315276635025 = 578307^2 + 561495^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 649715621274.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18047656129 + ... + 18047656164.

Almost surely, 2^649715621274 is an apocalyptic number.

649715621274 is an abundant number, since it is smaller than the sum of its proper divisors (758001558192).

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

649715621274 is a wasteful number, since it uses less digits than its factorization.

649715621274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36095312301 (or 36095312298 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 649715621274 in words is "six hundred forty-nine billion, seven hundred fifteen million, six hundred twenty-one thousand, two hundred seventy-four".