11899765623 has 4 divisors (see below), whose sum is σ = 15866354168. Its totient is φ = 7933177080.

The previous prime is 11899765601. The next prime is 11899765627. The reversal of 11899765623 is 32656799811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32656799811 = 3 ⋅10885599937.

It is not a de Polignac number, because 11899765623 - 2²⁴ = 11882988407 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 (11899765627) 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, 1983294268 + ... + 1983294273.

It is an arithmetic number, because the mean of its divisors is an integer number (3966588542).

Almost surely, 2^11899765623 is an apocalyptic number.

11899765623 is a deficient number, since it is larger than the sum of its proper divisors (3966588545).

11899765623 is an equidigital number, since it uses as much as digits as its factorization.

11899765623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966588544.

The product of its digits is 4898880, while the sum is 57.

The spelling of 11899765623 in words is "eleven billion, eight hundred ninety-nine million, seven hundred sixty-five thousand, six hundred twenty-three".