108821988577 has 4 divisors (see below), whose sum is σ = 114549461680. Its totient is φ = 103094515476.

The previous prime is 108821988559. The next prime is 108821988581. The reversal of 108821988577 is 775889128801.

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: 775889128801 = 5821 ⋅133291381.

It is a cyclic number.

It is not a de Polignac number, because 108821988577 - 2²³ = 108813599969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108821985577) 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, 2863736523 + ... + 2863736560.

It is an arithmetic number, because the mean of its divisors is an integer number (28637365420).

Almost surely, 2^108821988577 is an apocalyptic number.

It is an amenable number.

108821988577 is a deficient number, since it is larger than the sum of its proper divisors (5727473103).

108821988577 is an equidigital number, since it uses as much as digits as its factorization.

108821988577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5727473102.

The product of its (nonzero) digits is 18063360, while the sum is 64.

The spelling of 108821988577 in words is "one hundred eight billion, eight hundred twenty-one million, nine hundred eighty-eight thousand, five hundred seventy-seven".