99509662481 has 4 divisors (see below), whose sum is σ = 100994881392. Its totient is φ = 98024443572.

The previous prime is 99509662429. The next prime is 99509662513. The reversal of 99509662481 is 18426690599.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99509662481 - 2²² = 99505468177 is a prime.

It is a super-2 number, since 2×99509662481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99509662481.

It is not an unprimeable number, because it can be changed into a prime (99509661481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742609355 + ... + 742609488.

It is an arithmetic number, because the mean of its divisors is an integer number (25248720348).

Almost surely, 2^99509662481 is an apocalyptic number.

It is an amenable number.

99509662481 is a deficient number, since it is larger than the sum of its proper divisors (1485218911).

99509662481 is a wasteful number, since it uses less digits than its factorization.

99509662481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485218910.

The product of its (nonzero) digits is 8398080, while the sum is 59.

The spelling of 99509662481 in words is "ninety-nine billion, five hundred nine million, six hundred sixty-two thousand, four hundred eighty-one".