99118725591 has 4 divisors (see below), whose sum is σ = 132158300792. Its totient is φ = 66079150392.

The previous prime is 99118725569. The next prime is 99118725599. The reversal of 99118725591 is 19552781199.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 99118725591 - 2³⁰ = 98044983767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99118725599) 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, 16519787596 + ... + 16519787601.

It is an arithmetic number, because the mean of its divisors is an integer number (33039575198).

Almost surely, 2^99118725591 is an apocalyptic number.

99118725591 is a deficient number, since it is larger than the sum of its proper divisors (33039575201).

99118725591 is a wasteful number, since it uses less digits than its factorization.

99118725591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33039575200.

The product of its digits is 2041200, while the sum is 57.

The spelling of 99118725591 in words is "ninety-nine billion, one hundred eighteen million, seven hundred twenty-five thousand, five hundred ninety-one".