82537850557 has 4 divisors (see below), whose sum is σ = 82548891036. Its totient is φ = 82526810080.

The previous prime is 82537850519. The next prime is 82537850573. The reversal of 82537850557 is 75505873528.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46978828516 + 35559022041 = 216746^2 + 188571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82537850557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82537850498 and 82537850507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82537850257) 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, 5509018 + ... + 5523979.

It is an arithmetic number, because the mean of its divisors is an integer number (20637222759).

Almost surely, 2^82537850557 is an apocalyptic number.

It is an amenable number.

82537850557 is a deficient number, since it is larger than the sum of its proper divisors (11040479).

82537850557 is a wasteful number, since it uses less digits than its factorization.

82537850557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11040478.

The product of its (nonzero) digits is 11760000, while the sum is 55.

The spelling of 82537850557 in words is "eighty-two billion, five hundred thirty-seven million, eight hundred fifty thousand, five hundred fifty-seven".