1115857385279 has 16 divisors (see below), whose sum is σ = 1375625545728. Its totient is φ = 881421638112.

The previous prime is 1115857385243. The next prime is 1115857385299. The reversal of 1115857385279 is 9725837585111.

It is a cyclic number.

It is not a de Polignac number, because 1115857385279 - 2²⁰ = 1115856336703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115857385299) 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, 10045397 + ... + 10155870.

It is an arithmetic number, because the mean of its divisors is an integer number (85976596608).

Almost surely, 2^{1115857385279} is an apocalyptic number.

1115857385279 is a deficient number, since it is larger than the sum of its proper divisors (259768160449).

1115857385279 is a wasteful number, since it uses less digits than its factorization.

1115857385279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201894.

The product of its digits is 21168000, while the sum is 62.

The spelling of 1115857385279 in words is "one trillion, one hundred fifteen billion, eight hundred fifty-seven million, three hundred eighty-five thousand, two hundred seventy-nine".