118020173236681 has 9 divisors (see below), whose sum is σ = 119250484146549. Its totient is φ = 116802427503744.

The previous prime is 118020173236633. The next prime is 118020173236687. The reversal of 118020173236681 is 186632371020811.

The square root of 118020173236681 is 10863709.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 38594646826681 + 79425526410000 = 6212459^2 + 8912100^2 .

It is a de Polignac number, because none of the positive numbers 2^k-118020173236681 is a prime.

It is a super-2 number, since 2×118020173236681² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118020173236687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1053723775 + ... + 1053835771.

It is an arithmetic number, because the mean of its divisors is an integer number (13250053794061).

Almost surely, 2^{118020173236681} is an apocalyptic number.

118020173236681 is the 10863709-th square number.

118020173236681 is the 5431855-th centered octagonal number.

It is an amenable number.

118020173236681 is a deficient number, since it is larger than the sum of its proper divisors (1230310909868).

118020173236681 is an frugal number, since it uses more digits than its factorization.

118020173236681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224188 (or 112094 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 118020173236681 in words is "one hundred eighteen trillion, twenty billion, one hundred seventy-three million, two hundred thirty-six thousand, six hundred eighty-one".