108431778481 has 16 divisors (see below), whose sum is σ = 119827040256. Its totient is φ = 97486050816.

The previous prime is 108431778407. The next prime is 108431778503. The reversal of 108431778481 is 184877134801.

It is a cyclic number.

It is not a de Polignac number, because 108431778481 - 2⁹ = 108431777969 is a prime.

It is a super-2 number, since 2×108431778481² (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 (108431778401) 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, 77425 + ... + 472078.

It is an arithmetic number, because the mean of its divisors is an integer number (7489190016).

Almost surely, 2^108431778481 is an apocalyptic number.

It is an amenable number.

108431778481 is a deficient number, since it is larger than the sum of its proper divisors (11395261775).

108431778481 is a wasteful number, since it uses less digits than its factorization.

108431778481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549912.

The product of its (nonzero) digits is 1204224, while the sum is 52.

The spelling of 108431778481 in words is "one hundred eight billion, four hundred thirty-one million, seven hundred seventy-eight thousand, four hundred eighty-one".