649986895 has 16 divisors (see below), whose sum is σ = 793221120. Its totient is φ = 511207200.

The previous prime is 649986851. The next prime is 649986913. The reversal of 649986895 is 598689946.

It is not a de Polignac number, because 649986895 - 2⁷ = 649986767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132130 + ... + 136960.

It is an arithmetic number, because the mean of its divisors is an integer number (49576320).

Almost surely, 2^649986895 is an apocalyptic number.

649986895 is a deficient number, since it is larger than the sum of its proper divisors (143234225).

649986895 is a wasteful number, since it uses less digits than its factorization.

649986895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5286.

The product of its digits is 33592320, while the sum is 64.

The square root of 649986895 is about 25494.8405564734. The cubic root of 649986895 is about 866.2332837308.

The spelling of 649986895 in words is "six hundred forty-nine million, nine hundred eighty-six thousand, eight hundred ninety-five".