99446547899521 has 9 divisors (see below), whose sum is σ = 99509742531649. Its totient is φ = 99383393393284.

The previous prime is 99446547899497. The next prime is 99446547899533. The reversal of 99446547899521 is 12599874564499.

The square root of 99446547899521 is 9972289.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 99446547899521 - 2⁹ = 99446547899009 is a prime.

It is a super-2 number, since 2×99446547899521² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99446547899551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 29188888200 + ... + 29188891606.

Almost surely, 2^{99446547899521} is an apocalyptic number.

99446547899521 is the 9972289-th square number.

99446547899521 is the 4986145-th centered octagonal number.

It is an amenable number.

99446547899521 is a deficient number, since it is larger than the sum of its proper divisors (63194632128).

99446547899521 is an frugal number, since it uses more digits than its factorization.

99446547899521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12668 (or 6334 counting only the distinct ones).

The product of its digits is 7054387200, while the sum is 82.

The spelling of 99446547899521 in words is "ninety-nine trillion, four hundred forty-six billion, five hundred forty-seven million, eight hundred ninety-nine thousand, five hundred twenty-one".