82720406594222 has 16 divisors (see below), whose sum is σ = 127154235801600. Its totient is φ = 40336411637760.

The previous prime is 82720406594213. The next prime is 82720406594257. The reversal of 82720406594222 is 22249560402728.

It is a super-2 number, since 2×82720406594222² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187355822 + ... + 187796817.

It is an arithmetic number, because the mean of its divisors is an integer number (7947139737600).

Almost surely, 2^{82720406594222} is an apocalyptic number.

82720406594222 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

82720406594222 is a deficient number, since it is larger than the sum of its proper divisors (44433829207378).

82720406594222 is a wasteful number, since it uses less digits than its factorization.

82720406594222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375155371.

The product of its (nonzero) digits is 7741440, while the sum is 53.

The spelling of 82720406594222 in words is "eighty-two trillion, seven hundred twenty billion, four hundred six million, five hundred ninety-four thousand, two hundred twenty-two".