1155661796 has 24 divisors (see below), whose sum is σ = 2065444920. Its totient is φ = 565664000.

The previous prime is 1155661781. The next prime is 1155661813. The reversal of 1155661796 is 6971665511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 659976100 + 495685696 = 25690^2 + 22264^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1155661796.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19886 + ... + 52026.

It is an arithmetic number, because the mean of its divisors is an integer number (86060205).

Almost surely, 2^1155661796 is an apocalyptic number.

It is an amenable number.

1155661796 is a deficient number, since it is larger than the sum of its proper divisors (909783124).

1155661796 is a wasteful number, since it uses less digits than its factorization.

1155661796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32335 (or 32333 counting only the distinct ones).

The product of its digits is 340200, while the sum is 47.

The square root of 1155661796 is about 33995.0260479382. The cubic root of 1155661796 is about 1049.4061028453.

The spelling of 1155661796 in words is "one billion, one hundred fifty-five million, six hundred sixty-one thousand, seven hundred ninety-six".