649613525 has 48 divisors (see below), whose sum is σ = 914274816. Its totient is φ = 453600000.

The previous prime is 649613491. The next prime is 649613557. The reversal of 649613525 is 525316946.

It is not a de Polignac number, because 649613525 - 2⁸ = 649613269 is a prime.

It is a Curzon number.

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, 1542815 + ... + 1543235.

It is an arithmetic number, because the mean of its divisors is an integer number (19047392).

Almost surely, 2^649613525 is an apocalyptic number.

It is an amenable number.

649613525 is a deficient number, since it is larger than the sum of its proper divisors (264661291).

649613525 is a wasteful number, since it uses less digits than its factorization.

649613525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 649 counting only the distinct ones).

The product of its digits is 194400, while the sum is 41.

The square root of 649613525 is about 25487.5170426623. The cubic root of 649613525 is about 866.0673893763.

It can be divided in two parts, 64961 and 3525, that added together give a palindrome (68486).

The spelling of 649613525 in words is "six hundred forty-nine million, six hundred thirteen thousand, five hundred twenty-five".