1151255555 has 32 divisors (see below), whose sum is σ = 1537424064. Its totient is φ = 823689216.

The previous prime is 1151255533. The next prime is 1151255561. The reversal of 1151255555 is 5555521511.

It is a cyclic number.

It is not a de Polignac number, because 1151255555 - 2⁸ = 1151255299 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130979 + ... + 139491.

It is an arithmetic number, because the mean of its divisors is an integer number (48044502).

Almost surely, 2^1151255555 is an apocalyptic number.

1151255555 is a deficient number, since it is larger than the sum of its proper divisors (386168509).

1151255555 is a wasteful number, since it uses less digits than its factorization.

1151255555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8615.

The product of its digits is 31250, while the sum is 35.

The square root of 1151255555 is about 33930.1570140782. The cubic root of 1151255555 is about 1048.0706990914.

The spelling of 1151255555 in words is "one billion, one hundred fifty-one million, two hundred fifty-five thousand, five hundred fifty-five".