86169779522 has 6 divisors (see below), whose sum is σ = 129255291993. Its totient is φ = 43084682192.

The previous prime is 86169779497. The next prime is 86169779701. The reversal of 86169779522 is 22597796168.

It can be written as a sum of positive squares in 2 ways, for example, as 85802712241 + 367067281 = 292921^2 + 19159^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=207569.

It is a Duffinian number.

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, 311354 + ... + 518922.

Almost surely, 2^86169779522 is an apocalyptic number.

86169779522 is a deficient number, since it is larger than the sum of its proper divisors (43085512471).

86169779522 is an frugal number, since it uses more digits than its factorization.

86169779522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415140 (or 207571 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 62.

The spelling of 86169779522 in words is "eighty-six billion, one hundred sixty-nine million, seven hundred seventy-nine thousand, five hundred twenty-two".