81753400568 has 16 divisors (see below), whose sum is σ = 175185858480. Its totient is φ = 35037171648.

The previous prime is 81753400559. The next prime is 81753400627. The reversal of 81753400568 is 86500435718.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729941021 + ... + 729941132.

It is an arithmetic number, because the mean of its divisors is an integer number (10949116155).

Almost surely, 2^81753400568 is an apocalyptic number.

It is an amenable number.

81753400568 is an abundant number, since it is smaller than the sum of its proper divisors (93432457912).

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

81753400568 is a wasteful number, since it uses less digits than its factorization.

81753400568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459882166 (or 1459882162 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 81753400568 in words is "eighty-one billion, seven hundred fifty-three million, four hundred thousand, five hundred sixty-eight".