85167592501 has 4 divisors (see below), whose sum is σ = 86563782604. Its totient is φ = 83771402400.

The previous prime is 85167592493. The next prime is 85167592507. The reversal of 85167592501 is 10529576158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10529576158 = 2 ⋅5264788079.

It can be written as a sum of positive squares in 2 ways, for example, as 20786142276 + 64381450225 = 144174^2 + 253735^2 .

It is a cyclic number.

It is not a de Polignac number, because 85167592501 - 2³ = 85167592493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85167592507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698094960 + ... + 698095081.

It is an arithmetic number, because the mean of its divisors is an integer number (21640945651).

Almost surely, 2^85167592501 is an apocalyptic number.

It is an amenable number.

85167592501 is a deficient number, since it is larger than the sum of its proper divisors (1396190103).

85167592501 is a wasteful number, since it uses less digits than its factorization.

85167592501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396190102.

The product of its (nonzero) digits is 756000, while the sum is 49.

The spelling of 85167592501 in words is "eighty-five billion, one hundred sixty-seven million, five hundred ninety-two thousand, five hundred one".