649757274548 has 12 divisors (see below), whose sum is σ = 1196921295360. Its totient is φ = 307779761592.

The previous prime is 649757274547. The next prime is 649757274571. The reversal of 649757274548 is 845472757946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649757274547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4274718836 + ... + 4274718987.

It is an arithmetic number, because the mean of its divisors is an integer number (99743441280).

Almost surely, 2^649757274548 is an apocalyptic number.

It is an amenable number.

649757274548 is a deficient number, since it is larger than the sum of its proper divisors (547164020812).

649757274548 is a wasteful number, since it uses less digits than its factorization.

649757274548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8549437846 (or 8549437844 counting only the distinct ones).

The product of its digits is 474163200, while the sum is 68.

The spelling of 649757274548 in words is "six hundred forty-nine billion, seven hundred fifty-seven million, two hundred seventy-four thousand, five hundred forty-eight".