649610810 has 16 divisors (see below), whose sum is σ = 1175762952. Its totient is φ = 258408000.

The previous prime is 649610809. The next prime is 649610821. The reversal of 649610810 is 18016946.

It can be written as a sum of positive squares in 4 ways, for example, as 537822481 + 111788329 = 23191^2 + 10573^2 .

It is a super-2 number, since 2×649610810² = 843988408937712200, which contains 22 as substring.

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, 177641 + ... + 181260.

Almost surely, 2^649610810 is an apocalyptic number.

649610810 is a deficient number, since it is larger than the sum of its proper divisors (526152142).

649610810 is a wasteful number, since it uses less digits than its factorization.

649610810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359089.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 649610810 is about 25487.4637812396. The cubic root of 649610810 is about 866.0661828250.

The spelling of 649610810 in words is "six hundred forty-nine million, six hundred ten thousand, eight hundred ten".