86689391027572 has 6 divisors (see below), whose sum is σ = 151706434298258. Its totient is φ = 43344695513784.

The previous prime is 86689391027567. The next prime is 86689391027579. The reversal of 86689391027572 is 27572019398668.

It can be written as a sum of positive squares in only one way, i.e., 85299151948516 + 1390239079056 = 9235754^2 + 1179084^2 .

It is a junction number, because it is equal to n+sod(n) for n = 86689391027495 and 86689391027504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86689391027579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10836173878443 + ... + 10836173878450.

Almost surely, 2^{86689391027572} is an apocalyptic number.

It is an amenable number.

86689391027572 is a deficient number, since it is larger than the sum of its proper divisors (65017043270686).

86689391027572 is a wasteful number, since it uses less digits than its factorization.

86689391027572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21672347756897 (or 21672347756895 counting only the distinct ones).

The product of its (nonzero) digits is 548674560, while the sum is 73.

The spelling of 86689391027572 in words is "eighty-six trillion, six hundred eighty-nine billion, three hundred ninety-one million, twenty-seven thousand, five hundred seventy-two".