1156156155 has 48 divisors (see below), whose sum is σ = 2498505984. Its totient is φ = 480479040.

The previous prime is 1156156139. The next prime is 1156156159. The reversal of 1156156155 is 5516516511.

It is a happy number.

It is not a de Polignac number, because 1156156155 - 2⁴ = 1156156139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1156156159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 163369 + ... + 170298.

It is an arithmetic number, because the mean of its divisors is an integer number (52052208).

Almost surely, 2^1156156155 is an apocalyptic number.

1156156155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1156156155 is an abundant number, since it is smaller than the sum of its proper divisors (1342349829).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1156156155 is a wasteful number, since it uses less digits than its factorization.

1156156155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333696 (or 333693 counting only the distinct ones).

The product of its digits is 22500, while the sum is 36.

The square root of 1156156155 is about 34002.2963195135. The cubic root of 1156156155 is about 1049.5557168003. Note that the first 3 decimals are identical.

The spelling of 1156156155 in words is "one billion, one hundred fifty-six million, one hundred fifty-six thousand, one hundred fifty-five".