91270821156 has 48 divisors (see below), whose sum is σ = 222264470400. Its totient is φ = 29095621632.

The previous prime is 91270821143. The next prime is 91270821163. The reversal of 91270821156 is 65112807219.

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 15 ways as a sum of consecutive naturals, for example, 1692660 + ... + 1745748.

It is an arithmetic number, because the mean of its divisors is an integer number (4630509800).

Almost surely, 2^91270821156 is an apocalyptic number.

It is an amenable number.

91270821156 is an abundant number, since it is smaller than the sum of its proper divisors (130993649244).

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

91270821156 is a wasteful number, since it uses less digits than its factorization.

91270821156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59348 (or 59346 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The spelling of 91270821156 in words is "ninety-one billion, two hundred seventy million, eight hundred twenty-one thousand, one hundred fifty-six".