99531444580 has 24 divisors (see below), whose sum is σ = 209099644992. Its totient is φ = 39796651872.

The previous prime is 99531444503. The next prime is 99531444581. The reversal of 99531444580 is 8544413599.

It is a super-2 number, since 2×99531444580² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (99531444581) 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, 944062 + ... + 1044181.

It is an arithmetic number, because the mean of its divisors is an integer number (8712485208).

Almost surely, 2^99531444580 is an apocalyptic number.

It is an amenable number.

99531444580 is an abundant number, since it is smaller than the sum of its proper divisors (109568200412).

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

99531444580 is a wasteful number, since it uses less digits than its factorization.

99531444580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990755 (or 1990753 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 99531444580 in words is "ninety-nine billion, five hundred thirty-one million, four hundred forty-four thousand, five hundred eighty".