1155563137 has 4 divisors (see below), whose sum is σ = 1172810416. Its totient is φ = 1138315860.

The previous prime is 1155563131. The next prime is 1155563177. The reversal of 1155563137 is 7313655511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7313655511 = 79549 ⋅91939.

It is a cyclic number.

It is not a de Polignac number, because 1155563137 - 2¹¹ = 1155561089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1155563096 and 1155563105.

It is not an unprimeable number, because it can be changed into a prime (1155563131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8623539 + ... + 8623672.

It is an arithmetic number, because the mean of its divisors is an integer number (293202604).

Almost surely, 2^1155563137 is an apocalyptic number.

It is an amenable number.

1155563137 is a deficient number, since it is larger than the sum of its proper divisors (17247279).

1155563137 is an equidigital number, since it uses as much as digits as its factorization.

1155563137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17247278.

The product of its digits is 47250, while the sum is 37.

The square root of 1155563137 is about 33993.5749370377. The cubic root of 1155563137 is about 1049.3762393497.

The spelling of 1155563137 in words is "one billion, one hundred fifty-five million, five hundred sixty-three thousand, one hundred thirty-seven".