91415828256 has 48 divisors (see below), whose sum is σ = 240646430304. Its totient is φ = 30385608704.

The previous prime is 91415828209. The next prime is 91415828261. The reversal of 91415828256 is 65282851419.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 91415828199 and 91415828208.

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 7 ways as a sum of consecutive naturals, for example, 1314906 + ... + 1382681.

It is an arithmetic number, because the mean of its divisors is an integer number (5013467298).

Almost surely, 2^91415828256 is an apocalyptic number.

91415828256 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

91415828256 is an abundant number, since it is smaller than the sum of its proper divisors (149230602048).

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

91415828256 is a wasteful number, since it uses less digits than its factorization.

91415828256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697953 (or 2697945 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 51.

The spelling of 91415828256 in words is "ninety-one billion, four hundred fifteen million, eight hundred twenty-eight thousand, two hundred fifty-six".