118438762565 has 4 divisors (see below), whose sum is σ = 142126515084. Its totient is φ = 94751010048.

The previous prime is 118438762553. The next prime is 118438762571. The reversal of 118438762565 is 565267834811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565267834811 = 457 ⋅1236909923.

It can be written as a sum of positive squares in 2 ways, for example, as 18805733956 + 99633028609 = 137134^2 + 315647^2 .

It is a cyclic number.

It is not a de Polignac number, because 118438762565 - 2²² = 118434568261 is a prime.

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 118438762565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11843876252 + ... + 11843876261.

It is an arithmetic number, because the mean of its divisors is an integer number (35531628771).

Almost surely, 2^118438762565 is an apocalyptic number.

It is an amenable number.

118438762565 is a deficient number, since it is larger than the sum of its proper divisors (23687752519).

118438762565 is an equidigital number, since it uses as much as digits as its factorization.

118438762565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23687752518.

The product of its digits is 9676800, while the sum is 56.

The spelling of 118438762565 in words is "one hundred eighteen billion, four hundred thirty-eight million, seven hundred sixty-two thousand, five hundred sixty-five".