115854095509 has 4 divisors (see below), whose sum is σ = 115886006080. Its totient is φ = 115822184940.

The previous prime is 115854095503. The next prime is 115854095521. The reversal of 115854095509 is 905590458511.

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: 905590458511 = 2179 ⋅415599109.

It is a cyclic number.

It is not a de Polignac number, because 115854095509 - 2⁵ = 115854095477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115854095503) 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, 15949839 + ... + 15957100.

It is an arithmetic number, because the mean of its divisors is an integer number (28971501520).

Almost surely, 2^115854095509 is an apocalyptic number.

It is an amenable number.

115854095509 is a deficient number, since it is larger than the sum of its proper divisors (31910571).

115854095509 is an equidigital number, since it uses as much as digits as its factorization.

115854095509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31910570.

The product of its (nonzero) digits is 1620000, while the sum is 52.

The spelling of 115854095509 in words is "one hundred fifteen billion, eight hundred fifty-four million, ninety-five thousand, five hundred nine".