1165649996879 has 4 divisors (see below), whose sum is σ = 1168178522280. Its totient is φ = 1163121471480.

The previous prime is 1165649996873. The next prime is 1165649996887. The reversal of 1165649996879 is 9786999465611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1165649996879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165649996873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264262009 + ... + 1264262930.

It is an arithmetic number, because the mean of its divisors is an integer number (292044630570).

Almost surely, 2^{1165649996879} is an apocalyptic number.

1165649996879 is a deficient number, since it is larger than the sum of its proper divisors (2528525401).

1165649996879 is an equidigital number, since it uses as much as digits as its factorization.

1165649996879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528525400.

The product of its digits is 1587237120, while the sum is 80.

The spelling of 1165649996879 in words is "one trillion, one hundred sixty-five billion, six hundred forty-nine million, nine hundred ninety-six thousand, eight hundred seventy-nine".