1161255561717 has 8 divisors (see below), whose sum is σ = 1552777256800. Its totient is φ = 771952120560.

The previous prime is 1161255561707. The next prime is 1161255561733. The reversal of 1161255561717 is 7171655521611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1161255561717 - 2⁸ = 1161255561461 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 (1161255561707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554562259 + ... + 554564352.

It is an arithmetic number, because the mean of its divisors is an integer number (194097157100).

Almost surely, 2^{1161255561717} is an apocalyptic number.

It is an amenable number.

1161255561717 is a deficient number, since it is larger than the sum of its proper divisors (391521695083).

1161255561717 is a wasteful number, since it uses less digits than its factorization.

1161255561717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109126963.

The product of its digits is 441000, while the sum is 48.

The spelling of 1161255561717 in words is "one trillion, one hundred sixty-one billion, two hundred fifty-five million, five hundred sixty-one thousand, seven hundred seventeen".