91859467328 has 14 divisors (see below), whose sum is σ = 182283630606. Its totient is φ = 45929733632.

The previous prime is 91859467321. The next prime is 91859467351. The reversal of 91859467328 is 82376495819.

It can be written as a sum of positive squares in only one way, i.e., 68753035264 + 23106432064 = 262208^2 + 152008^2 .

It is not an unprimeable number, because it can be changed into a prime (91859467321) by changing a digit.

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 as a sum of consecutive naturals, namely, 717652025 + ... + 717652152.

It is an arithmetic number, because the mean of its divisors is an integer number (13020259329).

Almost surely, 2^91859467328 is an apocalyptic number.

It is an amenable number.

91859467328 is a deficient number, since it is larger than the sum of its proper divisors (90424163278).

91859467328 is a wasteful number, since it uses less digits than its factorization.

91859467328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435304189 (or 1435304179 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 62.

The spelling of 91859467328 in words is "ninety-one billion, eight hundred fifty-nine million, four hundred sixty-seven thousand, three hundred twenty-eight".