909664856480 has 96 divisors (see below), whose sum is σ = 2275872708816. Its totient is φ = 342405955584.

The previous prime is 909664856447. The next prime is 909664856489. The reversal of 909664856480 is 84658466909.

It can be written as a sum of positive squares in 8 ways, for example, as 430141845904 + 479523010576 = 655852^2 + 692476^2 .

It is a super-2 number, since 2×909664856480² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (909664856489) 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, 19007942 + ... + 19055738.

Almost surely, 2^909664856480 is an apocalyptic number.

It is an amenable number.

909664856480 is an abundant number, since it is smaller than the sum of its proper divisors (1366207852336).

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

909664856480 is a wasteful number, since it uses less digits than its factorization.

909664856480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54826 (or 54818 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 65.

The spelling of 909664856480 in words is "nine hundred nine billion, six hundred sixty-four million, eight hundred fifty-six thousand, four hundred eighty".