1115839885661 has 32 divisors (see below), whose sum is σ = 1212643934208. Its totient is φ = 1022735384320.

The previous prime is 1115839885631. The next prime is 1115839885681. The reversal of 1115839885661 is 1665889385111.

It is not a de Polignac number, because 1115839885661 - 2⁶ = 1115839885597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1115839885594 and 1115839885603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115839885631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135561416 + ... + 135569646.

It is an arithmetic number, because the mean of its divisors is an integer number (37895122944).

Almost surely, 2^{1115839885661} is an apocalyptic number.

It is an amenable number.

1115839885661 is a deficient number, since it is larger than the sum of its proper divisors (96804048547).

1115839885661 is a wasteful number, since it uses less digits than its factorization.

1115839885661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9121.

The product of its digits is 12441600, while the sum is 62.

The spelling of 1115839885661 in words is "one trillion, one hundred fifteen billion, eight hundred thirty-nine million, eight hundred eighty-five thousand, six hundred sixty-one".