99481575649 has 3 divisors (see below), whose sum is σ = 99481891057. Its totient is φ = 99481260242.

The previous prime is 99481575623. The next prime is 99481575653. The reversal of 99481575649 is 94657518499.

The square root of 99481575649 is 315407.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94657518499 = 121687 ⋅777877.

It is not a de Polignac number, because 99481575649 - 2²⁹ = 98944704737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99481572649) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 157704 + ... + 473110.

Almost surely, 2^99481575649 is an apocalyptic number.

99481575649 is the 315407-th square number.

99481575649 is the 157704-th centered octagonal number.

It is an amenable number.

99481575649 is a deficient number, since it is larger than the sum of its proper divisors (315408).

99481575649 is an frugal number, since it uses more digits than its factorization.

99481575649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630814 (or 315407 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 67.

The spelling of 99481575649 in words is "ninety-nine billion, four hundred eighty-one million, five hundred seventy-five thousand, six hundred forty-nine".