1155615499989 has 12 divisors (see below), whose sum is σ = 1671481156800. Its totient is φ = 769367825064.

The previous prime is 1155615499981. The next prime is 1155615500101. The reversal of 1155615499989 is 9899945165511.

1155615499989 is a `hidden beast` number, since 1 + 1 + 5 + 56 + 1 + 5 + 499 + 9 + 89 = 666.

It is not a de Polignac number, because 1155615499989 - 2³ = 1155615499981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155615499981) 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, 86868669 + ... + 86881970.

It is an arithmetic number, because the mean of its divisors is an integer number (139290096400).

Almost surely, 2^{1155615499989} is an apocalyptic number.

It is an amenable number.

1155615499989 is a deficient number, since it is larger than the sum of its proper divisors (515865656811).

1155615499989 is a wasteful number, since it uses less digits than its factorization.

1155615499989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173751384 (or 173751381 counting only the distinct ones).

The product of its digits is 157464000, while the sum is 72.

The spelling of 1155615499989 in words is "one trillion, one hundred fifty-five billion, six hundred fifteen million, four hundred ninety-nine thousand, nine hundred eighty-nine".