82578712322091 has 16 divisors (see below), whose sum is σ = 110299553251200. Its totient is φ = 54955175064768.

The previous prime is 82578712322081. The next prime is 82578712322129. The reversal of 82578712322091 is 19022321787528.

It is not a de Polignac number, because 82578712322091 - 2⁵ = 82578712322059 is a prime.

It is a super-2 number, since 2×82578712322091² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82578712322021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243895980 + ... + 244234326.

It is an arithmetic number, because the mean of its divisors is an integer number (6893722078200).

Almost surely, 2^{82578712322091} is an apocalyptic number.

82578712322091 is a deficient number, since it is larger than the sum of its proper divisors (27720840929109).

82578712322091 is a wasteful number, since it uses less digits than its factorization.

82578712322091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481898.

The product of its (nonzero) digits is 6773760, while the sum is 57.

The spelling of 82578712322091 in words is "eighty-two trillion, five hundred seventy-eight billion, seven hundred twelve million, three hundred twenty-two thousand, ninety-one".