649463815 has 32 divisors (see below), whose sum is σ = 1046416896. Its totient is φ = 373714560.

The previous prime is 649463807. The next prime is 649463831. The reversal of 649463815 is 518364946.

It is not a de Polignac number, because 649463815 - 2³ = 649463807 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59877 + ... + 69886.

It is an arithmetic number, because the mean of its divisors is an integer number (32700528).

Almost surely, 2^649463815 is an apocalyptic number.

649463815 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

649463815 is a deficient number, since it is larger than the sum of its proper divisors (396953081).

649463815 is a wasteful number, since it uses less digits than its factorization.

649463815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129799.

The product of its digits is 622080, while the sum is 46.

The square root of 649463815 is about 25484.5799455278. The cubic root of 649463815 is about 866.0008529381. Note that the first 3 decimals are identical.

It can be divided in two parts, 649 and 463815, that added together give a palindrome (464464).

The spelling of 649463815 in words is "six hundred forty-nine million, four hundred sixty-three thousand, eight hundred fifteen".