649258864 has 20 divisors (see below), whose sum is σ = 1260137104. Its totient is φ = 324062208.

The previous prime is 649258801. The next prime is 649258867. The reversal of 649258864 is 468852946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649258867) 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, 25932 + ... + 44395.

Almost surely, 2^649258864 is an apocalyptic number.

It is an amenable number.

649258864 is a deficient number, since it is larger than the sum of its proper divisors (610878240).

649258864 is a wasteful number, since it uses less digits than its factorization.

649258864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70912 (or 70906 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 52.

The square root of 649258864 is about 25480.5585496080. The cubic root of 649258864 is about 865.9097488561.

It can be divided in two parts, 6492 and 58864, that added together give a palindrome (65356).

The spelling of 649258864 in words is "six hundred forty-nine million, two hundred fifty-eight thousand, eight hundred sixty-four".