860239555081 has 3 divisors (see below), whose sum is σ = 860240482573. Its totient is φ = 860238627590.

The previous prime is 860239555033. The next prime is 860239555171. The reversal of 860239555081 is 180555932068.

The square root of 860239555081 is 927491.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 860239555081 - 2¹⁵ = 860239522313 is a prime.

It is a super-2 number, since 2×860239555081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (860239558081) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 463746 + ... + 1391236.

Almost surely, 2^860239555081 is an apocalyptic number.

860239555081 is the 927491-st square number.

860239555081 is the 463746-th centered octagonal number.

It is an amenable number.

860239555081 is a deficient number, since it is larger than the sum of its proper divisors (927492).

860239555081 is an frugal number, since it uses more digits than its factorization.

860239555081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854982 (or 927491 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 860239555081 in words is "eight hundred sixty billion, two hundred thirty-nine million, five hundred fifty-five thousand, eighty-one".