649613526 has 16 divisors (see below), whose sum is σ = 1300147200. Its totient is φ = 216384488.

The previous prime is 649613491. The next prime is 649613557. The reversal of 649613526 is 625316946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28986 + ... + 46253.

It is an arithmetic number, because the mean of its divisors is an integer number (81259200).

Almost surely, 2^649613526 is an apocalyptic number.

649613526 is an abundant number, since it is smaller than the sum of its proper divisors (650533674).

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

649613526 is a wasteful number, since it uses less digits than its factorization.

649613526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76683.

The product of its digits is 233280, while the sum is 42.

The square root of 649613526 is about 25487.5170622797. The cubic root of 649613526 is about 866.0673898207.

The spelling of 649613526 in words is "six hundred forty-nine million, six hundred thirteen thousand, five hundred twenty-six".