1145615555 has 16 divisors (see below), whose sum is σ = 1581681600. Its totient is φ = 780289152.

The previous prime is 1145615539. The next prime is 1145615593. The reversal of 1145615555 is 5555165411.

It is a cyclic number.

It is not a de Polignac number, because 1145615555 - 2⁴ = 1145615539 is a prime.

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, 104624 + ... + 115053.

It is an arithmetic number, because the mean of its divisors is an integer number (98855100).

Almost surely, 2^1145615555 is an apocalyptic number.

1145615555 is a deficient number, since it is larger than the sum of its proper divisors (436066045).

1145615555 is a wasteful number, since it uses less digits than its factorization.

1145615555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219838.

The product of its digits is 75000, while the sum is 38.

The square root of 1145615555 is about 33846.9430672845. The cubic root of 1145615555 is about 1046.3563974230.

The spelling of 1145615555 in words is "one billion, one hundred forty-five million, six hundred fifteen thousand, five hundred fifty-five".