650991610 has 16 divisors (see below), whose sum is σ = 1176651432. Its totient is φ = 259315200.

The previous prime is 650991587. The next prime is 650991617. The reversal of 650991610 is 16199056.

It can be written as a sum of positive squares in 4 ways, for example, as 543309481 + 107682129 = 23309^2 + 10377^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 650991610.

It is not an unprimeable number, because it can be changed into a prime (650991617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132651 + ... + 137470.

Almost surely, 2^650991610 is an apocalyptic number.

650991610 is a deficient number, since it is larger than the sum of its proper divisors (525659822).

650991610 is a wasteful number, since it uses less digits than its factorization.

650991610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270369.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 650991610 is about 25514.5372288035. The cubic root of 650991610 is about 866.6793796623.

The spelling of 650991610 in words is "six hundred fifty million, nine hundred ninety-one thousand, six hundred ten".