85873500561 has 4 divisors (see below), whose sum is σ = 114498000752. Its totient is φ = 57249000372.

The previous prime is 85873500553. The next prime is 85873500569. The reversal of 85873500561 is 16500537858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (85873500553) and next prime (85873500569).

It is not a de Polignac number, because 85873500561 - 2³ = 85873500553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85873500561.

It is not an unprimeable number, because it can be changed into a prime (85873500569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14312250091 + ... + 14312250096.

It is an arithmetic number, because the mean of its divisors is an integer number (28624500188).

Almost surely, 2^85873500561 is an apocalyptic number.

It is an amenable number.

85873500561 is a deficient number, since it is larger than the sum of its proper divisors (28624500191).

85873500561 is a wasteful number, since it uses less digits than its factorization.

85873500561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28624500190.

The product of its (nonzero) digits is 1008000, while the sum is 48.

The spelling of 85873500561 in words is "eighty-five billion, eight hundred seventy-three million, five hundred thousand, five hundred sixty-one".