99775257919 has 4 divisors (see below), whose sum is σ = 99782045800. Its totient is φ = 99768470040.

The previous prime is 99775257913. The next prime is 99775257937. The reversal of 99775257919 is 91975257799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91975257799 = 7753 ⋅11863183.

It is a cyclic number.

It is not a de Polignac number, because 99775257919 - 2²⁵ = 99741703487 is a prime.

It is a super-2 number, since 2×99775257919² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99775257913) 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, 3371844 + ... + 3401305.

It is an arithmetic number, because the mean of its divisors is an integer number (24945511450).

Almost surely, 2^99775257919 is an apocalyptic number.

99775257919 is a deficient number, since it is larger than the sum of its proper divisors (6787881).

99775257919 is a wasteful number, since it uses less digits than its factorization.

99775257919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6787880.

The product of its digits is 112521150, while the sum is 70.

The spelling of 99775257919 in words is "ninety-nine billion, seven hundred seventy-five million, two hundred fifty-seven thousand, nine hundred nineteen".