1166857307815 has 16 divisors (see below), whose sum is σ = 1440316419840. Its totient is φ = 906839470080.

The previous prime is 1166857307789. The next prime is 1166857307879. The reversal of 1166857307815 is 5187037586611.

It is not a de Polignac number, because 1166857307815 - 2⁷ = 1166857307687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1166857307815.

It is a congruent number.

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, 4801335 + ... + 5038504.

It is an arithmetic number, because the mean of its divisors is an integer number (90019776240).

Almost surely, 2^{1166857307815} is an apocalyptic number.

1166857307815 is a deficient number, since it is larger than the sum of its proper divisors (273459112025).

1166857307815 is an equidigital number, since it uses as much as digits as its factorization.

1166857307815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9840522.

The product of its (nonzero) digits is 8467200, while the sum is 58.

The spelling of 1166857307815 in words is "one trillion, one hundred sixty-six billion, eight hundred fifty-seven million, three hundred seven thousand, eight hundred fifteen".