86239719556 has 9 divisors (see below), whose sum is σ = 150920537061. Its totient is φ = 43119566112.

The previous prime is 86239719541. The next prime is 86239719581. The reversal of 86239719556 is 65591793268.

The square root of 86239719556 is 293666.

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

It can be written as a sum of positive squares in only one way, i.e., 85901748100 + 337971456 = 293090^2 + 18384^2 .

It is a super-4 number, since 4×86239719556⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86239719494 and 86239719503.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 513916 + ... + 660748.

Almost surely, 2^86239719556 is an apocalyptic number.

86239719556 is the 293666-th square number.

It is an amenable number.

86239719556 is a deficient number, since it is larger than the sum of its proper divisors (64680817505).

86239719556 is an frugal number, since it uses more digits than its factorization.

86239719556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293670 (or 146835 counting only the distinct ones).

The product of its digits is 24494400, while the sum is 61.

The spelling of 86239719556 in words is "eighty-six billion, two hundred thirty-nine million, seven hundred nineteen thousand, five hundred fifty-six".