1156155128 has 16 divisors (see below), whose sum is σ = 2168156760. Its totient is φ = 577980000.

The previous prime is 1156155127. The next prime is 1156155173. The reversal of 1156155128 is 8215516511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156155127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74003 + ... + 88253.

Almost surely, 2^1156155128 is an apocalyptic number.

It is an amenable number.

1156155128 is a deficient number, since it is larger than the sum of its proper divisors (1012001632).

1156155128 is a wasteful number, since it uses less digits than its factorization.

1156155128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24398 (or 24394 counting only the distinct ones).

The product of its digits is 12000, while the sum is 35.

The square root of 1156155128 is about 34002.2812175889. The cubic root of 1156155128 is about 1049.5554060308. Note that the first 3 decimals are identical.

The spelling of 1156155128 in words is "one billion, one hundred fifty-six million, one hundred fifty-five thousand, one hundred twenty-eight".