109155023691 has 16 divisors (see below), whose sum is σ = 170388331008. Its totient is φ = 60852974400.

The previous prime is 109155023687. The next prime is 109155023713. The reversal of 109155023691 is 196320551901.

It is not a de Polignac number, because 109155023691 - 2² = 109155023687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109155023641) 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, 63387655 + ... + 63389376.

It is an arithmetic number, because the mean of its divisors is an integer number (10649270688).

Almost surely, 2^109155023691 is an apocalyptic number.

109155023691 is a deficient number, since it is larger than the sum of its proper divisors (61233307317).

109155023691 is a wasteful number, since it uses less digits than its factorization.

109155023691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126777082.

The product of its (nonzero) digits is 72900, while the sum is 42.

The spelling of 109155023691 in words is "one hundred nine billion, one hundred fifty-five million, twenty-three thousand, six hundred ninety-one".