91863728204 has 24 divisors (see below), whose sum is σ = 161209557600. Its totient is φ = 45803923200.

The previous prime is 91863728191. The next prime is 91863728221. The reversal of 91863728204 is 40282736819.

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 7 ways as a sum of consecutive naturals, for example, 7675577 + ... + 7687535.

It is an arithmetic number, because the mean of its divisors is an integer number (6717064900).

Almost surely, 2^91863728204 is an apocalyptic number.

It is an amenable number.

91863728204 is a deficient number, since it is larger than the sum of its proper divisors (69345829396).

91863728204 is a wasteful number, since it uses less digits than its factorization.

91863728204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17153 (or 17151 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 91863728204 in words is "ninety-one billion, eight hundred sixty-three million, seven hundred twenty-eight thousand, two hundred four".