91485685827 has 24 divisors (see below), whose sum is σ = 143173231344. Its totient is φ = 56067830784.

The previous prime is 91485685777. The next prime is 91485685849. The reversal of 91485685827 is 72858658419.

91485685827 is a `hidden beast` number, since 9 + 1 + 48 + 5 + 6 + 8 + 582 + 7 = 666.

It is not a de Polignac number, because 91485685827 - 2¹⁵ = 91485653059 is a prime.

It is a super-2 number, since 2×91485685827² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91485685327) 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 23 ways as a sum of consecutive naturals, for example, 6946278 + ... + 6959435.

It is an arithmetic number, because the mean of its divisors is an integer number (5965551306).

Almost surely, 2^91485685827 is an apocalyptic number.

91485685827 is a deficient number, since it is larger than the sum of its proper divisors (51687545517).

91485685827 is a wasteful number, since it uses less digits than its factorization.

91485685827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13905779 (or 13905776 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 63.

The spelling of 91485685827 in words is "ninety-one billion, four hundred eighty-five million, six hundred eighty-five thousand, eight hundred twenty-seven".