1171845655 has 4 divisors (see below), whose sum is σ = 1406214792. Its totient is φ = 937476520.

The previous prime is 1171845643. The next prime is 1171845667. The reversal of 1171845655 is 5565481711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5565481711 = 349 ⋅15946939.

It is an interprime number because it is at equal distance from previous prime (1171845643) and next prime (1171845667).

It is not a de Polignac number, because 1171845655 - 2⁷ = 1171845527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117184561 + ... + 117184570.

It is an arithmetic number, because the mean of its divisors is an integer number (351553698).

Almost surely, 2^1171845655 is an apocalyptic number.

1171845655 is a deficient number, since it is larger than the sum of its proper divisors (234369137).

1171845655 is an equidigital number, since it uses as much as digits as its factorization.

1171845655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234369136.

The product of its digits is 168000, while the sum is 43.

The square root of 1171845655 is about 34232.2312302310. The cubic root of 1171845655 is about 1054.2820313647.

The spelling of 1171845655 in words is "one billion, one hundred seventy-one million, eight hundred forty-five thousand, six hundred fifty-five".