649159566 has 16 divisors (see below), whose sum is σ = 1416348288. Its totient is φ = 196715000.

The previous prime is 649159493. The next prime is 649159573. The reversal of 649159566 is 665951946.

649159566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 4917810 + ... + 4917941.

It is an arithmetic number, because the mean of its divisors is an integer number (88521768).

Almost surely, 2^649159566 is an apocalyptic number.

649159566 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

649159566 is an abundant number, since it is smaller than the sum of its proper divisors (767188722).

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

649159566 is a wasteful number, since it uses less digits than its factorization.

649159566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9835767.

The product of its digits is 1749600, while the sum is 51.

The square root of 649159566 is about 25478.6099699336. The cubic root of 649159566 is about 865.8656023711.

The spelling of 649159566 in words is "six hundred forty-nine million, one hundred fifty-nine thousand, five hundred sixty-six".