1115661561636 has 24 divisors (see below), whose sum is σ = 2611689831520. Its totient is φ = 370675827072.

The previous prime is 1115661561607. The next prime is 1115661561647. The reversal of 1115661561636 is 6361651665111.

It is a super-2 number, since 2×1115661561636² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151416181 + ... + 151423548.

Almost surely, 2^{1115661561636} is an apocalyptic number.

It is an amenable number.

1115661561636 is an abundant number, since it is smaller than the sum of its proper divisors (1496028269884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1115661561636 is a wasteful number, since it uses less digits than its factorization.

1115661561636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302840043 (or 302840041 counting only the distinct ones).

The product of its digits is 583200, while the sum is 48.

The spelling of 1115661561636 in words is "one trillion, one hundred fifteen billion, six hundred sixty-one million, five hundred sixty-one thousand, six hundred thirty-six".