91071711270 has 24 divisors (see below), whose sum is σ = 236786449536. Its totient is φ = 24285789648.

The previous prime is 91071711251. The next prime is 91071711271. The reversal of 91071711270 is 7211717019.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91071711271) 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 in 11 ways as a sum of consecutive naturals, for example, 505953862 + ... + 505954041.

It is an arithmetic number, because the mean of its divisors is an integer number (9866102064).

Almost surely, 2^91071711270 is an apocalyptic number.

91071711270 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

91071711270 is an abundant number, since it is smaller than the sum of its proper divisors (145714738266).

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

91071711270 is a wasteful number, since it uses less digits than its factorization.

91071711270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011907916 (or 1011907913 counting only the distinct ones).

The product of its (nonzero) digits is 6174, while the sum is 36.

The spelling of 91071711270 in words is "ninety-one billion, seventy-one million, seven hundred eleven thousand, two hundred seventy".