1161255561718 has 16 divisors (see below), whose sum is σ = 1992538544544. Its totient is φ = 497227273920.

The previous prime is 1161255561707. The next prime is 1161255561733. The reversal of 1161255561718 is 8171655521611.

It is a super-2 number, since 2×1161255561718² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37790853 + ... + 37821568.

It is an arithmetic number, because the mean of its divisors is an integer number (124533659034).

Almost surely, 2^{1161255561718} is an apocalyptic number.

1161255561718 is a deficient number, since it is larger than the sum of its proper divisors (831282982826).

1161255561718 is a wasteful number, since it uses less digits than its factorization.

1161255561718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75613527.

The product of its digits is 504000, while the sum is 49.

The spelling of 1161255561718 in words is "one trillion, one hundred sixty-one billion, two hundred fifty-five million, five hundred sixty-one thousand, seven hundred eighteen".