85142241539 has 2 divisors, whose sum is σ = 85142241540. Its totient is φ = 85142241538.

The previous prime is 85142241497. The next prime is 85142241557. The reversal of 85142241539 is 93514224158.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85142241539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85142241539.

It is not a weakly prime, because it can be changed into another prime (85142241559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42571120769 + 42571120770.

It is an arithmetic number, because the mean of its divisors is an integer number (42571120770).

Almost surely, 2^85142241539 is an apocalyptic number.

85142241539 is a deficient number, since it is larger than the sum of its proper divisors (1).

85142241539 is an equidigital number, since it uses as much as digits as its factorization.

85142241539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 44.

The spelling of 85142241539 in words is "eighty-five billion, one hundred forty-two million, two hundred forty-one thousand, five hundred thirty-nine".