91771025252 has 24 divisors (see below), whose sum is σ = 161499394560. Its totient is φ = 45628518240.

The previous prime is 91771025233. The next prime is 91771025267. The reversal of 91771025252 is 25252017719.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2207999 + ... + 2249177.

It is an arithmetic number, because the mean of its divisors is an integer number (6729141440).

Almost surely, 2^91771025252 is an apocalyptic number.

It is an amenable number.

91771025252 is a deficient number, since it is larger than the sum of its proper divisors (69728369308).

91771025252 is a wasteful number, since it uses less digits than its factorization.

91771025252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44291 (or 44289 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 91771025252 in words is "ninety-one billion, seven hundred seventy-one million, twenty-five thousand, two hundred fifty-two".