85176769261 has 4 divisors (see below), whose sum is σ = 85445466012. Its totient is φ = 84908072512.

The previous prime is 85176769259. The next prime is 85176769303. The reversal of 85176769261 is 16296767158.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8340255625 + 76836513636 = 91325^2 + 277194^2 .

It is a cyclic number.

It is not a de Polignac number, because 85176769261 - 2¹ = 85176769259 is a prime.

It is a super-2 number, since 2×85176769261² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85176769196 and 85176769205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85176769211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134347900 + ... + 134348533.

It is an arithmetic number, because the mean of its divisors is an integer number (21361366503).

Almost surely, 2^85176769261 is an apocalyptic number.

It is an amenable number.

85176769261 is a deficient number, since it is larger than the sum of its proper divisors (268696751).

85176769261 is a wasteful number, since it uses less digits than its factorization.

85176769261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268696750.

The product of its digits is 7620480, while the sum is 58.

The spelling of 85176769261 in words is "eighty-five billion, one hundred seventy-six million, seven hundred sixty-nine thousand, two hundred sixty-one".