80725785668 has 12 divisors (see below), whose sum is σ = 154112863632. Its totient is φ = 36693538920.

The previous prime is 80725785661. The next prime is 80725785671. The reversal of 80725785668 is 86658752708.

It is a self number, because there is not a number n which added to its sum of digits gives 80725785668.

It is not an unprimeable number, because it can be changed into a prime (80725785661) by changing a digit.

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, 917338430 + ... + 917338517.

It is an arithmetic number, because the mean of its divisors is an integer number (12842738636).

Almost surely, 2^80725785668 is an apocalyptic number.

It is an amenable number.

80725785668 is a deficient number, since it is larger than the sum of its proper divisors (73387077964).

80725785668 is a wasteful number, since it uses less digits than its factorization.

80725785668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834676962 (or 1834676960 counting only the distinct ones).

The product of its (nonzero) digits is 45158400, while the sum is 62.

The spelling of 80725785668 in words is "eighty billion, seven hundred twenty-five million, seven hundred eighty-five thousand, six hundred sixty-eight".