109937718661 has 4 divisors (see below), whose sum is σ = 115723914400. Its totient is φ = 104151522924.

The previous prime is 109937718647. The next prime is 109937718689. The reversal of 109937718661 is 166817739901.

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: 166817739901 = 1459 ⋅114337039.

It is a cyclic number.

It is not a de Polignac number, because 109937718661 - 2⁷ = 109937718533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109937718596 and 109937718605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109937718061) 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, 2893097841 + ... + 2893097878.

It is an arithmetic number, because the mean of its divisors is an integer number (28930978600).

Almost surely, 2^109937718661 is an apocalyptic number.

It is an amenable number.

109937718661 is a deficient number, since it is larger than the sum of its proper divisors (5786195739).

109937718661 is an equidigital number, since it uses as much as digits as its factorization.

109937718661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5786195738.

The product of its (nonzero) digits is 3429216, while the sum is 58.

The spelling of 109937718661 in words is "one hundred nine billion, nine hundred thirty-seven million, seven hundred eighteen thousand, six hundred sixty-one".