649172722372 has 24 divisors (see below), whose sum is σ = 1198619130240. Its totient is φ = 306789389280.

The previous prime is 649172722369. The next prime is 649172722399. The reversal of 649172722372 is 273227271946.

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 7 ways as a sum of consecutive naturals, for example, 9876463 + ... + 9941974.

It is an arithmetic number, because the mean of its divisors is an integer number (49942463760).

Almost surely, 2^649172722372 is an apocalyptic number.

It is an amenable number.

649172722372 is a deficient number, since it is larger than the sum of its proper divisors (549446407868).

649172722372 is a wasteful number, since it uses less digits than its factorization.

649172722372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19818891 (or 19818889 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 52.

The spelling of 649172722372 in words is "six hundred forty-nine billion, one hundred seventy-two million, seven hundred twenty-two thousand, three hundred seventy-two".