85539247791 has 8 divisors (see below), whose sum is σ = 114113623344. Its totient is φ = 56995518720.

The previous prime is 85539247777. The next prime is 85539247823. The reversal of 85539247791 is 19774293558.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85539247791 - 2²¹ = 85537150639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85539247771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7655106 + ... + 7666271.

It is an arithmetic number, because the mean of its divisors is an integer number (14264202918).

Almost surely, 2^85539247791 is an apocalyptic number.

85539247791 is a deficient number, since it is larger than the sum of its proper divisors (28574375553).

85539247791 is a wasteful number, since it uses less digits than its factorization.

85539247791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15323241.

The product of its digits is 19051200, while the sum is 60.

The spelling of 85539247791 in words is "eighty-five billion, five hundred thirty-nine million, two hundred forty-seven thousand, seven hundred ninety-one".