1155818964 has 24 divisors (see below), whose sum is σ = 2700317088. Its totient is φ = 384786400.

The previous prime is 1155818957. The next prime is 1155818981. The reversal of 1155818964 is 4698185511.

It is a congruent number.

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, 50862 + ... + 69989.

It is an arithmetic number, because the mean of its divisors is an integer number (112513212).

Almost surely, 2^1155818964 is an apocalyptic number.

It is an amenable number.

1155818964 is an abundant number, since it is smaller than the sum of its proper divisors (1544498124).

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

1155818964 is a wasteful number, since it uses less digits than its factorization.

1155818964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121655 (or 121653 counting only the distinct ones).

The product of its digits is 345600, while the sum is 48.

The square root of 1155818964 is about 33997.3376016417. The cubic root of 1155818964 is about 1049.4536731589.

The spelling of 1155818964 in words is "one billion, one hundred fifty-five million, eight hundred eighteen thousand, nine hundred sixty-four".