109881887509 has 2 divisors, whose sum is σ = 109881887510. Its totient is φ = 109881887508.

The previous prime is 109881887483. The next prime is 109881887569. The reversal of 109881887509 is 905788188901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109877664484 + 4223025 = 331478^2 + 2055^2 .

It is a cyclic number.

It is not a de Polignac number, because 109881887509 - 2⁵ = 109881887477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109881887569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54940943754 + 54940943755.

It is an arithmetic number, because the mean of its divisors is an integer number (54940943755).

Almost surely, 2^109881887509 is an apocalyptic number.

It is an amenable number.

109881887509 is a deficient number, since it is larger than the sum of its proper divisors (1).

109881887509 is an equidigital number, since it uses as much as digits as its factorization.

109881887509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11612160, while the sum is 64.

The spelling of 109881887509 in words is "one hundred nine billion, eight hundred eighty-one million, eight hundred eighty-seven thousand, five hundred nine".