108918535681 has 16 divisors (see below), whose sum is σ = 112732139520. Its totient is φ = 105124055760.

The previous prime is 108918535669. The next prime is 108918535699. The reversal of 108918535681 is 186535819801.

It is a cyclic number.

It is not a de Polignac number, because 108918535681 - 2¹³ = 108918527489 is a prime.

It is a super-2 number, since 2×108918535681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108918535601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27207226 + ... + 27211228.

It is an arithmetic number, because the mean of its divisors is an integer number (7045758720).

Almost surely, 2^108918535681 is an apocalyptic number.

It is an amenable number.

108918535681 is a deficient number, since it is larger than the sum of its proper divisors (3813603839).

108918535681 is a wasteful number, since it uses less digits than its factorization.

108918535681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6156.

The product of its (nonzero) digits is 2073600, while the sum is 55.

The spelling of 108918535681 in words is "one hundred eight billion, nine hundred eighteen million, five hundred thirty-five thousand, six hundred eighty-one".