649872812 has 6 divisors (see below), whose sum is σ = 1137277428. Its totient is φ = 324936404.

The previous prime is 649872799. The next prime is 649872829. The reversal of 649872812 is 218278946.

It is a happy number.

649872812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81234098 + ... + 81234105.

It is an arithmetic number, because the mean of its divisors is an integer number (189546238).

Almost surely, 2^649872812 is an apocalyptic number.

It is an amenable number.

649872812 is a deficient number, since it is larger than the sum of its proper divisors (487404616).

649872812 is a wasteful number, since it uses less digits than its factorization.

649872812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162468207 (or 162468205 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 649872812 is about 25492.6030840320. The cubic root of 649872812 is about 866.1826015428.

The spelling of 649872812 in words is "six hundred forty-nine million, eight hundred seventy-two thousand, eight hundred twelve".