85579577539 has 4 divisors (see below), whose sum is σ = 85580870056. Its totient is φ = 85578285024.

The previous prime is 85579577533. The next prime is 85579577557. The reversal of 85579577539 is 93577597558.

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

It is a cyclic number.

It is not a de Polignac number, because 85579577539 - 2¹¹ = 85579575491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85579577533) 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, 541254 + ... + 681259.

It is an arithmetic number, because the mean of its divisors is an integer number (21395217514).

Almost surely, 2^85579577539 is an apocalyptic number.

85579577539 is a deficient number, since it is larger than the sum of its proper divisors (1292517).

85579577539 is a wasteful number, since it uses less digits than its factorization.

85579577539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292516.

The product of its digits is 416745000, while the sum is 70.

The spelling of 85579577539 in words is "eighty-five billion, five hundred seventy-nine million, five hundred seventy-seven thousand, five hundred thirty-nine".