1151818857 has 48 divisors (see below), whose sum is σ = 1969324032. Its totient is φ = 634819680.

The previous prime is 1151818853. The next prime is 1151818859. The reversal of 1151818857 is 7588181511.

1151818857 is a `hidden beast` number, since 1 + 1 + 518 + 1 + 88 + 57 = 666.

It is not a de Polignac number, because 1151818857 - 2² = 1151818853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1151818853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 715948 + ... + 717554.

It is an arithmetic number, because the mean of its divisors is an integer number (41027584).

Almost surely, 2^1151818857 is an apocalyptic number.

It is an amenable number.

1151818857 is a deficient number, since it is larger than the sum of its proper divisors (817505175).

1151818857 is a wasteful number, since it uses less digits than its factorization.

1151818857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018 (or 2015 counting only the distinct ones).

The product of its digits is 89600, while the sum is 45.

The square root of 1151818857 is about 33938.4569036366. The cubic root of 1151818857 is about 1048.2416093221.

The spelling of 1151818857 in words is "one billion, one hundred fifty-one million, eight hundred eighteen thousand, eight hundred fifty-seven".