91571454371 has 4 divisors (see below), whose sum is σ = 91869733032. Its totient is φ = 91273175712.

The previous prime is 91571454361. The next prime is 91571454437. The reversal of 91571454371 is 17345417519.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17345417519 = 137 ⋅126608887.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91571454371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91571454361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149138870 + ... + 149139483.

It is an arithmetic number, because the mean of its divisors is an integer number (22967433258).

Almost surely, 2^91571454371 is an apocalyptic number.

91571454371 is a deficient number, since it is larger than the sum of its proper divisors (298278661).

91571454371 is a wasteful number, since it uses less digits than its factorization.

91571454371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298278660.

The product of its digits is 529200, while the sum is 47.

The spelling of 91571454371 in words is "ninety-one billion, five hundred seventy-one million, four hundred fifty-four thousand, three hundred seventy-one".