1155166520 has 16 divisors (see below), whose sum is σ = 2599124760. Its totient is φ = 462066592.

The previous prime is 1155166477. The next prime is 1155166549. The reversal of 1155166520 is 256615511.

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, 14439542 + ... + 14439621.

Almost surely, 2^1155166520 is an apocalyptic number.

1155166520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155166520 is an abundant number, since it is smaller than the sum of its proper divisors (1443958240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155166520 is a wasteful number, since it uses less digits than its factorization.

1155166520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28879174 (or 28879170 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 1155166520 is about 33987.7407310342. The cubic root of 1155166520 is about 1049.2561685754.

The spelling of 1155166520 in words is "one billion, one hundred fifty-five million, one hundred sixty-six thousand, five hundred twenty".