81748084692 has 24 divisors (see below), whose sum is σ = 190750190400. Its totient is φ = 27248695936.

The previous prime is 81748084661. The next prime is 81748084699. The reversal of 81748084692 is 29648084718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81748084699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 825409 + ... + 919127.

It is an arithmetic number, because the mean of its divisors is an integer number (7947924600).

Almost surely, 2^81748084692 is an apocalyptic number.

It is an amenable number.

81748084692 is an abundant number, since it is smaller than the sum of its proper divisors (109002105708).

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

81748084692 is a wasteful number, since it uses less digits than its factorization.

81748084692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166415 (or 166413 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 57.

The spelling of 81748084692 in words is "eighty-one billion, seven hundred forty-eight million, eighty-four thousand, six hundred ninety-two".