1115855999972 has 18 divisors (see below), whose sum is σ = 2271564000342. Its totient is φ = 478223999904.

The previous prime is 1115855999963. The next prime is 1115856000001. The reversal of 1115855999972 is 2799995585111.

It can be written as a sum of positive squares in only one way, i.e., 1109685269056 + 6170730916 = 1053416^2 + 78554^2 .

It is a super-2 number, since 2×1115855999972² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1115855999896 and 1115855999905.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2846571233 + ... + 2846571624.

It is an arithmetic number, because the mean of its divisors is an integer number (126198000019).

Almost surely, 2^{1115855999972} is an apocalyptic number.

It is an amenable number.

1115855999972 is an abundant number, since it is smaller than the sum of its proper divisors (1155708000370).

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

1115855999972 is a wasteful number, since it uses less digits than its factorization.

1115855999972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5693142875 (or 5693142866 counting only the distinct ones).

The product of its digits is 91854000, while the sum is 71.

The spelling of 1115855999972 in words is "one trillion, one hundred fifteen billion, eight hundred fifty-five million, nine hundred ninety-nine thousand, nine hundred seventy-two".