649872507144 has 32 divisors (see below), whose sum is σ = 1856778592320. Its totient is φ = 185677859136.

The previous prime is 649872507143. The next prime is 649872507181. The reversal of 649872507144 is 441705278946.

It is not an unprimeable number, because it can be changed into a prime (649872507143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1934144199 + ... + 1934144534.

It is an arithmetic number, because the mean of its divisors is an integer number (58024331010).

Almost surely, 2^649872507144 is an apocalyptic number.

It is an amenable number.

649872507144 is an abundant number, since it is smaller than the sum of its proper divisors (1206906085176).

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

649872507144 is a wasteful number, since it uses less digits than its factorization.

649872507144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3868288749 (or 3868288745 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 649872507144 in words is "six hundred forty-nine billion, eight hundred seventy-two million, five hundred seven thousand, one hundred forty-four".