109905378497 has 4 divisors (see below), whose sum is σ = 110877992580. Its totient is φ = 108932764416.

The previous prime is 109905378493. The next prime is 109905378503. The reversal of 109905378497 is 794873509901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794873509901 = 353 ⋅2251766317.

It can be written as a sum of positive squares in 2 ways, for example, as 33985291201 + 75920087296 = 184351^2 + 275536^2 .

It is a cyclic number.

It is not a de Polignac number, because 109905378497 - 2² = 109905378493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109905378493) 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, 486306872 + ... + 486307097.

It is an arithmetic number, because the mean of its divisors is an integer number (27719498145).

Almost surely, 2^109905378497 is an apocalyptic number.

It is an amenable number.

109905378497 is a deficient number, since it is larger than the sum of its proper divisors (972614083).

109905378497 is an equidigital number, since it uses as much as digits as its factorization.

109905378497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972614082.

The product of its (nonzero) digits is 17146080, while the sum is 62.

The spelling of 109905378497 in words is "one hundred nine billion, nine hundred five million, three hundred seventy-eight thousand, four hundred ninety-seven".