1155898166 has 32 divisors (see below), whose sum is σ = 1856286720. Its totient is φ = 538554016.

The previous prime is 1155898157. The next prime is 1155898201. The reversal of 1155898166 is 6618985511.

It is a super-2 number, since 2×1155898166² = 2672201140324327112, which 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 15 ways as a sum of consecutive naturals, for example, 515600 + ... + 517836.

It is an arithmetic number, because the mean of its divisors is an integer number (58008960).

Almost surely, 2^1155898166 is an apocalyptic number.

1155898166 is a deficient number, since it is larger than the sum of its proper divisors (700388554).

1155898166 is a wasteful number, since it uses less digits than its factorization.

1155898166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548.

The product of its digits is 518400, while the sum is 50.

The square root of 1155898166 is about 33998.5024081944. The cubic root of 1155898166 is about 1049.4776437327.

The spelling of 1155898166 in words is "one billion, one hundred fifty-five million, eight hundred ninety-eight thousand, one hundred sixty-six".