649851996 has 48 divisors (see below), whose sum is σ = 1607316480. Its totient is φ = 203646720.

The previous prime is 649851989. The next prime is 649851997. The reversal of 649851996 is 699158946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649851997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357931 + ... + 359741.

It is an arithmetic number, because the mean of its divisors is an integer number (33485760).

Almost surely, 2^649851996 is an apocalyptic number.

It is an amenable number.

649851996 is an abundant number, since it is smaller than the sum of its proper divisors (957464484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649851996 is a wasteful number, since it uses less digits than its factorization.

649851996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594 (or 3592 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 57.

The square root of 649851996 is about 25492.1948054694. The cubic root of 649851996 is about 866.1733532462.

The spelling of 649851996 in words is "six hundred forty-nine million, eight hundred fifty-one thousand, nine hundred ninety-six".