1155188813125 has 30 divisors (see below), whose sum is σ = 1533432246170. Its totient is φ = 869789088000.

The previous prime is 1155188813111. The next prime is 1155188813167. The reversal of 1155188813125 is 5213188815511.

It can be written as a sum of positive squares in 15 ways, for example, as 791185344196 + 364003468929 = 889486^2 + 603327^2 .

It is not a de Polignac number, because 1155188813125 - 2¹⁵ = 1155188780357 is a prime.

It is a super-2 number, since 2×1155188813125² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3017130 + ... + 3378379.

Almost surely, 2^{1155188813125} is an apocalyptic number.

It is an amenable number.

1155188813125 is a deficient number, since it is larger than the sum of its proper divisors (378243433045).

1155188813125 is an frugal number, since it uses more digits than its factorization.

1155188813125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395563 (or 6395531 counting only the distinct ones).

The product of its digits is 384000, while the sum is 49.

The spelling of 1155188813125 in words is "one trillion, one hundred fifty-five billion, one hundred eighty-eight million, eight hundred thirteen thousand, one hundred twenty-five".