646515265120 has 48 divisors (see below), whose sum is σ = 1529476346160. Its totient is φ = 258253254144.

The previous prime is 646515265117. The next prime is 646515265127. The reversal of 646515265120 is 21562515646.

It is a super-2 number, since 2×646515265120² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646515265127) 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, 2639010 + ... + 2873569.

It is an arithmetic number, because the mean of its divisors is an integer number (31864090545).

Almost surely, 2^646515265120 is an apocalyptic number.

It is an amenable number.

646515265120 is an abundant number, since it is smaller than the sum of its proper divisors (882961081040).

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

646515265120 is a wasteful number, since it uses less digits than its factorization.

646515265120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5513327 (or 5513319 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 646515265120 in words is "six hundred forty-six billion, five hundred fifteen million, two hundred sixty-five thousand, one hundred twenty".