99775118437 has 4 divisors (see below), whose sum is σ = 105026440480. Its totient is φ = 94523796396.

The previous prime is 99775118389. The next prime is 99775118447. The reversal of 99775118437 is 73481157799.

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 a de Polignac number, because none of the positive numbers 2^k-99775118437 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 (99775118447) 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, 2625660993 + ... + 2625661030.

It is an arithmetic number, because the mean of its divisors is an integer number (26256610120).

Almost surely, 2^99775118437 is an apocalyptic number.

It is an amenable number.

99775118437 is a deficient number, since it is larger than the sum of its proper divisors (5251322043).

99775118437 is a wasteful number, since it uses less digits than its factorization.

99775118437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5251322042.

The product of its digits is 13335840, while the sum is 61.

The spelling of 99775118437 in words is "ninety-nine billion, seven hundred seventy-five million, one hundred eighteen thousand, four hundred thirty-seven".