82531814977 has 4 divisors (see below), whose sum is σ = 84544786116. Its totient is φ = 80518843840.

The previous prime is 82531814947. The next prime is 82531814987. The reversal of 82531814977 is 77941813528.

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 20694548736 + 61837266241 = 143856^2 + 248671^2 .

It is not a de Polignac number, because 82531814977 - 2¹¹ = 82531812929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82531814947) 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, 1006485508 + ... + 1006485589.

It is an arithmetic number, because the mean of its divisors is an integer number (21136196529).

Almost surely, 2^82531814977 is an apocalyptic number.

It is an amenable number.

82531814977 is a deficient number, since it is larger than the sum of its proper divisors (2012971139).

82531814977 is a wasteful number, since it uses less digits than its factorization.

82531814977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012971138.

The product of its digits is 3386880, while the sum is 55.

The spelling of 82531814977 in words is "eighty-two billion, five hundred thirty-one million, eight hundred fourteen thousand, nine hundred seventy-seven".