81079196475 has 24 divisors (see below), whose sum is σ = 134349548400. Its totient is φ = 43145912320.

The previous prime is 81079196461. The next prime is 81079196491. The reversal of 81079196475 is 57469197018.

It is not a de Polignac number, because 81079196475 - 2¹⁸ = 81078934331 is a prime.

It is a super-2 number, since 2×81079196475² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1170174 + ... + 1237523.

It is an arithmetic number, because the mean of its divisors is an integer number (5597897850).

Almost surely, 2^81079196475 is an apocalyptic number.

81079196475 is a deficient number, since it is larger than the sum of its proper divisors (53270351925).

81079196475 is a wasteful number, since it uses less digits than its factorization.

81079196475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408159 (or 2408154 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 57.

The spelling of 81079196475 in words is "eighty-one billion, seventy-nine million, one hundred ninety-six thousand, four hundred seventy-five".