1155163656025 has 6 divisors (see below), whose sum is σ = 1432402933502. Its totient is φ = 924130924800.

The previous prime is 1155163656019. The next prime is 1155163656037. The reversal of 1155163656025 is 5206563615511.

It can be written as a sum of positive squares in 3 ways, for example, as 186206921289 + 968956734736 = 431517^2 + 984356^2 .

It is not a de Polignac number, because 1155163656025 - 2¹⁷ = 1155163524953 is a prime.

It is a Duffinian number.

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, 23103273096 + ... + 23103273145.

Almost surely, 2^{1155163656025} is an apocalyptic number.

It is an amenable number.

1155163656025 is a deficient number, since it is larger than the sum of its proper divisors (277239277477).

1155163656025 is an equidigital number, since it uses as much as digits as its factorization.

1155163656025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46206546251 (or 46206546246 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 1155163656025 in words is "one trillion, one hundred fifty-five billion, one hundred sixty-three million, six hundred fifty-six thousand, twenty-five".