108888712781 has 4 divisors (see below), whose sum is σ = 111205493952. Its totient is φ = 106571931612.

The previous prime is 108888712763. The next prime is 108888712799. The reversal of 108888712781 is 187217888801.

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, and also an emirpimes, since its reverse is a distinct semiprime: 187217888801 = 29 ⋅6455789269.

It is an interprime number because it is at equal distance from previous prime (108888712763) and next prime (108888712799).

It is a cyclic number.

It is not a de Polignac number, because 108888712781 - 2¹⁸ = 108888450637 is a prime.

It is a super-2 number, since 2×108888712781² (a number of 23 digits) contains 22 as substring.

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 108888712781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108888715781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1158390515 + ... + 1158390608.

It is an arithmetic number, because the mean of its divisors is an integer number (27801373488).

Almost surely, 2^108888712781 is an apocalyptic number.

It is an amenable number.

108888712781 is a deficient number, since it is larger than the sum of its proper divisors (2316781171).

108888712781 is an equidigital number, since it uses as much as digits as its factorization.

108888712781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316781170.

The product of its (nonzero) digits is 3211264, while the sum is 59.

The spelling of 108888712781 in words is "one hundred eight billion, eight hundred eighty-eight million, seven hundred twelve thousand, seven hundred eighty-one".