82721932853 has 4 divisors (see below), whose sum is σ = 94539351840. Its totient is φ = 70904513868.

The previous prime is 82721932849. The next prime is 82721932859. The reversal of 82721932853 is 35823912728.

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 82721932853 - 2² = 82721932849 is a prime.

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 (82721932859) 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, 5908709483 + ... + 5908709496.

It is an arithmetic number, because the mean of its divisors is an integer number (23634837960).

Almost surely, 2^82721932853 is an apocalyptic number.

It is an amenable number.

82721932853 is a deficient number, since it is larger than the sum of its proper divisors (11817418987).

82721932853 is a wasteful number, since it uses less digits than its factorization.

82721932853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11817418986.

The product of its digits is 1451520, while the sum is 50.

The spelling of 82721932853 in words is "eighty-two billion, seven hundred twenty-one million, nine hundred thirty-two thousand, eight hundred fifty-three".