85307082557 has 4 divisors (see below), whose sum is σ = 85447622016. Its totient is φ = 85166543100.

The previous prime is 85307082499. The next prime is 85307082559. The reversal of 85307082557 is 75528070358.

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 85307082557 - 2¹⁰ = 85307081533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85307082559) 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, 70268819 + ... + 70270032.

It is an arithmetic number, because the mean of its divisors is an integer number (21361905504).

Almost surely, 2^85307082557 is an apocalyptic number.

It is an amenable number.

85307082557 is a deficient number, since it is larger than the sum of its proper divisors (140539459).

85307082557 is a wasteful number, since it uses less digits than its factorization.

85307082557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140539458.

The product of its (nonzero) digits is 2352000, while the sum is 50.

The spelling of 85307082557 in words is "eighty-five billion, three hundred seven million, eighty-two thousand, five hundred fifty-seven".