1155644653187 has 2 divisors, whose sum is σ = 1155644653188. Its totient is φ = 1155644653186.

The previous prime is 1155644653099. The next prime is 1155644653253. The reversal of 1155644653187 is 7813564465511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155644653187 - 2¹⁰ = 1155644652163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155644353187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577822326593 + 577822326594.

It is an arithmetic number, because the mean of its divisors is an integer number (577822326594).

Almost surely, 2^{1155644653187} is an apocalyptic number.

1155644653187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155644653187 is an equidigital number, since it uses as much as digits as its factorization.

1155644653187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096000, while the sum is 56.

The spelling of 1155644653187 in words is "one trillion, one hundred fifty-five billion, six hundred forty-four million, six hundred fifty-three thousand, one hundred eighty-seven".