649716620 has 24 divisors (see below), whose sum is σ = 1559320224. Its totient is φ = 222759936.

The previous prime is 649716607. The next prime is 649716623. The reversal of 649716620 is 26617946.

It is not an unprimeable number, because it can be changed into a prime (649716623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2320277 + ... + 2320556.

It is an arithmetic number, because the mean of its divisors is an integer number (64971676).

Almost surely, 2^649716620 is an apocalyptic number.

It is an amenable number.

649716620 is an abundant number, since it is smaller than the sum of its proper divisors (909603604).

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

649716620 is a wasteful number, since it uses less digits than its factorization.

649716620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4640849 (or 4640847 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 649716620 is about 25489.5394230653. The cubic root of 649716620 is about 866.1132025104.

The spelling of 649716620 in words is "six hundred forty-nine million, seven hundred sixteen thousand, six hundred twenty".