646601131416 has 32 divisors (see below), whose sum is σ = 1623440622960. Its totient is φ = 214608671232.

The previous prime is 646601131411. The next prime is 646601131447. The reversal of 646601131416 is 614131106646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646601131411) 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, 57809245 + ... + 57820428.

Almost surely, 2^646601131416 is an apocalyptic number.

It is an amenable number.

646601131416 is an abundant number, since it is smaller than the sum of its proper divisors (976839491544).

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

646601131416 is a wasteful number, since it uses less digits than its factorization.

646601131416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115629915 (or 115629911 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 646601131416 in words is "six hundred forty-six billion, six hundred one million, one hundred thirty-one thousand, four hundred sixteen".