81746007192 has 64 divisors (see below), whose sum is σ = 227378304000. Its totient is φ = 27211941792.

The previous prime is 81746007181. The next prime is 81746007263. The reversal of 81746007192 is 29170064718.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94192 + ... + 415167.

It is an arithmetic number, because the mean of its divisors is an integer number (3552786000).

Almost surely, 2^81746007192 is an apocalyptic number.

It is an amenable number.

81746007192 is an abundant number, since it is smaller than the sum of its proper divisors (145632296808).

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

81746007192 is a wasteful number, since it uses less digits than its factorization.

81746007192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510117 (or 510107 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 81746007192 in words is "eighty-one billion, seven hundred forty-six million, seven thousand, one hundred ninety-two".