82473850721 has 4 divisors (see below), whose sum is σ = 83603629572. Its totient is φ = 81344071872.

The previous prime is 82473850703. The next prime is 82473850729. The reversal of 82473850721 is 12705837428.

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 37736947600 + 44736903121 = 194260^2 + 211511^2 .

It is a cyclic number.

It is not a de Polignac number, because 82473850721 - 2³⁴ = 65293981537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82473850729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564889316 + ... + 564889461.

It is an arithmetic number, because the mean of its divisors is an integer number (20900907393).

Almost surely, 2^82473850721 is an apocalyptic number.

It is an amenable number.

82473850721 is a deficient number, since it is larger than the sum of its proper divisors (1129778851).

82473850721 is a wasteful number, since it uses less digits than its factorization.

82473850721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129778850.

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 82473850721 in words is "eighty-two billion, four hundred seventy-three million, eight hundred fifty thousand, seven hundred twenty-one".