649692513 has 24 divisors (see below), whose sum is σ = 972281856. Its totient is φ = 417614400.

The previous prime is 649692487. The next prime is 649692521. The reversal of 649692513 is 315296946.

649692513 is a `hidden beast` number, since 6 + 49 + 6 + 92 + 513 = 666.

It is not a de Polignac number, because 649692513 - 2¹⁶ = 649626977 is a prime.

It is a super-3 number, since 3×649692513³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (649692313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74256 + ... + 82542.

It is an arithmetic number, because the mean of its divisors is an integer number (40511744).

Almost surely, 2^649692513 is an apocalyptic number.

It is an amenable number.

649692513 is a deficient number, since it is larger than the sum of its proper divisors (322589343).

649692513 is a wasteful number, since it uses less digits than its factorization.

649692513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8605 (or 8602 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 649692513 is about 25489.0665384200. The cubic root of 649692513 is about 866.1024903278.

The spelling of 649692513 in words is "six hundred forty-nine million, six hundred ninety-two thousand, five hundred thirteen".