1158994785 has 16 divisors (see below), whose sum is σ = 1997037504. Its totient is φ = 570581952.

The previous prime is 1158994741. The next prime is 1158994807. The reversal of 1158994785 is 5874998511.

It is not a de Polignac number, because 1158994785 - 2⁶ = 1158994721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2971587 + ... + 2971976.

It is an arithmetic number, because the mean of its divisors is an integer number (124814844).

Almost surely, 2^1158994785 is an apocalyptic number.

1158994785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1158994785 is a deficient number, since it is larger than the sum of its proper divisors (838042719).

1158994785 is a wasteful number, since it uses less digits than its factorization.

1158994785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5943584.

The product of its digits is 3628800, while the sum is 57.

The square root of 1158994785 is about 34044.0124691553. The cubic root of 1158994785 is about 1050.4139818833.

The spelling of 1158994785 in words is "one billion, one hundred fifty-eight million, nine hundred ninety-four thousand, seven hundred eighty-five".