649632510 has 24 divisors (see below), whose sum is σ = 1689044760. Its totient is φ = 173235312.

The previous prime is 649632499. The next prime is 649632517. The reversal of 649632510 is 15236946.

It is a happy number.

649632510 is a `hidden beast` number, since 6 + 4 + 9 + 632 + 5 + 10 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649632517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3608980 + ... + 3609159.

It is an arithmetic number, because the mean of its divisors is an integer number (70376865).

Almost surely, 2^649632510 is an apocalyptic number.

649632510 is an abundant number, since it is smaller than the sum of its proper divisors (1039412250).

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

649632510 is a wasteful number, since it uses less digits than its factorization.

649632510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7218152 (or 7218149 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 649632510 is about 25487.8894771615. The cubic root of 649632510 is about 866.0758262538.

The spelling of 649632510 in words is "six hundred forty-nine million, six hundred thirty-two thousand, five hundred ten".