649486915 has 24 divisors (see below), whose sum is σ = 989055792. Its totient is φ = 404873280.

The previous prime is 649486909. The next prime is 649486919. The reversal of 649486915 is 519684946.

It is a happy number.

It is not a de Polignac number, because 649486915 - 2⁵ = 649486883 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649486919) 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, 117804 + ... + 123193.

It is an arithmetic number, because the mean of its divisors is an integer number (41210658).

Almost surely, 2^649486915 is an apocalyptic number.

649486915 is a deficient number, since it is larger than the sum of its proper divisors (339568877).

649486915 is a wasteful number, since it uses less digits than its factorization.

649486915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241027 (or 241020 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The square root of 649486915 is about 25485.0331567373. The cubic root of 649486915 is about 866.0111200652.

The spelling of 649486915 in words is "six hundred forty-nine million, four hundred eighty-six thousand, nine hundred fifteen".