1156388155 has 16 divisors (see below), whose sum is σ = 1497321504. Its totient is φ = 852284160.

The previous prime is 1156388153. The next prime is 1156388171. The reversal of 1156388155 is 5518836511.

It is not a de Polignac number, because 1156388155 - 2¹ = 1156388153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156388153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16792 + ... + 50938.

It is an arithmetic number, because the mean of its divisors is an integer number (93582594).

Almost surely, 2^1156388155 is an apocalyptic number.

1156388155 is a deficient number, since it is larger than the sum of its proper divisors (340933349).

1156388155 is a wasteful number, since it uses less digits than its factorization.

1156388155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34686.

The product of its digits is 144000, while the sum is 43.

The square root of 1156388155 is about 34005.7076826817. The cubic root of 1156388155 is about 1049.6259151150.

The spelling of 1156388155 in words is "one billion, one hundred fifty-six million, three hundred eighty-eight thousand, one hundred fifty-five".