1155355555 has 8 divisors (see below), whose sum is σ = 1409155344. Its totient is φ = 909132000.

The previous prime is 1155355543. The next prime is 1155355561. The reversal of 1155355555 is 5555535511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1155355555 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1893721 + ... + 1894330.

It is an arithmetic number, because the mean of its divisors is an integer number (176144418).

Almost surely, 2^1155355555 is an apocalyptic number.

1155355555 is a deficient number, since it is larger than the sum of its proper divisors (253799789).

1155355555 is an equidigital number, since it uses as much as digits as its factorization.

1155355555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3788117.

The product of its digits is 234375, while the sum is 40.

The square root of 1155355555 is about 33990.5215464547. The cubic root of 1155355555 is about 1049.3133999552.

The spelling of 1155355555 in words is "one billion, one hundred fifty-five million, three hundred fifty-five thousand, five hundred fifty-five".