85267563521 has 4 divisors (see below), whose sum is σ = 97448644032. Its totient is φ = 73086483012.

The previous prime is 85267563473. The next prime is 85267563539. The reversal of 85267563521 is 12536576258.

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 a cyclic number.

It is not a de Polignac number, because 85267563521 - 2⁶ = 85267563457 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 85267563521.

It is not an unprimeable number, because it can be changed into a prime (85267563421) 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, 6090540245 + ... + 6090540258.

It is an arithmetic number, because the mean of its divisors is an integer number (24362161008).

Almost surely, 2^85267563521 is an apocalyptic number.

It is an amenable number.

85267563521 is a deficient number, since it is larger than the sum of its proper divisors (12181080511).

85267563521 is a wasteful number, since it uses less digits than its factorization.

85267563521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12181080510.

The product of its digits is 3024000, while the sum is 50.

The spelling of 85267563521 in words is "eighty-five billion, two hundred sixty-seven million, five hundred sixty-three thousand, five hundred twenty-one".