1115855999971 has 8 divisors (see below), whose sum is σ = 1134228434000. Its totient is φ = 1097486137440.

The previous prime is 1115855999963. The next prime is 1115856000001. The reversal of 1115855999971 is 1799995585111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1115855999971 - 2³ = 1115855999963 is a prime.

It is a super-2 number, since 2×1115855999971² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1115855999971.

It is not an unprimeable number, because it can be changed into a prime (1115855999471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242080 + ... + 1513378.

It is an arithmetic number, because the mean of its divisors is an integer number (141778554250).

Almost surely, 2^{1115855999971} is an apocalyptic number.

1115855999971 is a deficient number, since it is larger than the sum of its proper divisors (18372434029).

1115855999971 is a wasteful number, since it uses less digits than its factorization.

1115855999971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285749.

The product of its digits is 45927000, while the sum is 70.

The spelling of 1115855999971 in words is "one trillion, one hundred fifteen billion, eight hundred fifty-five million, nine hundred ninety-nine thousand, nine hundred seventy-one".