649656455 has 48 divisors (see below), whose sum is σ = 969310080. Its totient is φ = 415533888.

The previous prime is 649656443. The next prime is 649656481. The reversal of 649656455 is 554656946.

It is not a de Polignac number, because 649656455 - 2⁶ = 649656391 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 310844 + ... + 312926.

It is an arithmetic number, because the mean of its divisors is an integer number (20193960).

Almost surely, 2^649656455 is an apocalyptic number.

649656455 is a deficient number, since it is larger than the sum of its proper divisors (319653625).

649656455 is a wasteful number, since it uses less digits than its factorization.

649656455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188 (or 2181 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 50.

The square root of 649656455 is about 25488.3592057237. The cubic root of 649656455 is about 866.0864671062.

The spelling of 649656455 in words is "six hundred forty-nine million, six hundred fifty-six thousand, four hundred fifty-five".