81196170432 has 56 divisors (see below), whose sum is σ = 231357044016. Its totient is φ = 24983436288.

The previous prime is 81196170431. The next prime is 81196170437. The reversal of 81196170432 is 23407169118.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81196170431) 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 7 ways as a sum of consecutive naturals, for example, 16262763 + ... + 16267754.

It is an arithmetic number, because the mean of its divisors is an integer number (4131375786).

Almost surely, 2^81196170432 is an apocalyptic number.

It is an amenable number.

81196170432 is an abundant number, since it is smaller than the sum of its proper divisors (150160873584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81196170432 is a wasteful number, since it uses less digits than its factorization.

81196170432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32530545 (or 32530535 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 81196170432 in words is "eighty-one billion, one hundred ninety-six million, one hundred seventy thousand, four hundred thirty-two".