649176646 has 16 divisors (see below), whose sum is σ = 993894480. Its totient is φ = 317918880.

The previous prime is 649176623. The next prime is 649176659. The reversal of 649176646 is 646671946.

It is a self number, because there is not a number n which added to its sum of digits gives 649176646.

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, 22756 + ... + 42616.

It is an arithmetic number, because the mean of its divisors is an integer number (62118405).

Almost surely, 2^649176646 is an apocalyptic number.

649176646 is a deficient number, since it is larger than the sum of its proper divisors (344717834).

649176646 is a wasteful number, since it uses less digits than its factorization.

649176646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20199.

The product of its digits is 1306368, while the sum is 49.

The square root of 649176646 is about 25478.9451508496. The cubic root of 649176646 is about 865.8731962179.

The spelling of 649176646 in words is "six hundred forty-nine million, one hundred seventy-six thousand, six hundred forty-six".