649159889 has 24 divisors (see below), whose sum is σ = 794173248. Its totient is φ = 528047520.

The previous prime is 649159879. The next prime is 649159897. The reversal of 649159889 is 988951946.

It is not a de Polignac number, because 649159889 - 2¹⁶ = 649094353 is a prime.

It is a super-2 number, since 2×649159889² = 842817122972984642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649159879) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145439 + ... + 149835.

It is an arithmetic number, because the mean of its divisors is an integer number (33090552).

Almost surely, 2^649159889 is an apocalyptic number.

It is an amenable number.

649159889 is a deficient number, since it is larger than the sum of its proper divisors (145013359).

649159889 is a wasteful number, since it uses less digits than its factorization.

649159889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4565 (or 4558 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 59.

The square root of 649159889 is about 25478.6163085832. The cubic root of 649159889 is about 865.8657459796.

The spelling of 649159889 in words is "six hundred forty-nine million, one hundred fifty-nine thousand, eight hundred eighty-nine".