1115972005561 has 12 divisors (see below), whose sum is σ = 1304324000400. Its totient is φ = 952014024360.

The previous prime is 1115972005549. The next prime is 1115972005567. The reversal of 1115972005561 is 1655002795111.

It is not a de Polignac number, because 1115972005561 - 2⁵ = 1115972005529 is a prime.

It is a super-2 number, since 2×1115972005561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115972005567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53958711 + ... + 53979388.

It is an arithmetic number, because the mean of its divisors is an integer number (108693666700).

Almost surely, 2^{1115972005561} is an apocalyptic number.

It is an amenable number.

1115972005561 is a deficient number, since it is larger than the sum of its proper divisors (188351994839).

1115972005561 is a wasteful number, since it uses less digits than its factorization.

1115972005561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107938324 (or 107938317 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 43.

The spelling of 1115972005561 in words is "one trillion, one hundred fifteen billion, nine hundred seventy-two million, five thousand, five hundred sixty-one".