82771514789 has 4 divisors (see below), whose sum is σ = 82772268480. Its totient is φ = 82770761100.

The previous prime is 82771514767. The next prime is 82771514801. The reversal of 82771514789 is 98741517728.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 82771514789 - 2⁸ = 82771514533 is a prime.

It is a super-2 number, since 2×82771514789² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82771514719) 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, 176669 + ... + 443570.

It is an arithmetic number, because the mean of its divisors is an integer number (20693067120).

Almost surely, 2^82771514789 is an apocalyptic number.

It is an amenable number.

82771514789 is a deficient number, since it is larger than the sum of its proper divisors (753691).

82771514789 is a wasteful number, since it uses less digits than its factorization.

82771514789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753690.

The product of its digits is 7902720, while the sum is 59.

The spelling of 82771514789 in words is "eighty-two billion, seven hundred seventy-one million, five hundred fourteen thousand, seven hundred eighty-nine".