1155550155 has 32 divisors (see below), whose sum is σ = 1865660160. Its totient is φ = 610727040.

The previous prime is 1155550147. The next prime is 1155550157. The reversal of 1155550155 is 5510555511.

It is not a de Polignac number, because 1155550155 - 2³ = 1155550147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155550157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1028424 + ... + 1029546.

It is an arithmetic number, because the mean of its divisors is an integer number (58301880).

Almost surely, 2^1155550155 is an apocalyptic number.

1155550155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155550155 is a deficient number, since it is larger than the sum of its proper divisors (710110005).

1155550155 is a wasteful number, since it uses less digits than its factorization.

1155550155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691.

The product of its (nonzero) digits is 15625, while the sum is 33.

The square root of 1155550155 is about 33993.3839886529. The cubic root of 1155550155 is about 1049.3723096485.

The spelling of 1155550155 in words is "one billion, one hundred fifty-five million, five hundred fifty thousand, one hundred fifty-five".