91309051471 has 16 divisors (see below), whose sum is σ = 99778038048. Its totient is φ = 82868227200.

The previous prime is 91309051321. The next prime is 91309051487. The reversal of 91309051471 is 17415090319.

It is a de Polignac number, because none of the positive numbers 2^k-91309051471 is a prime.

It is a super-3 number, since 3×91309051471³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91309055471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29828281 + ... + 29831341.

It is an arithmetic number, because the mean of its divisors is an integer number (6236127378).

Almost surely, 2^91309051471 is an apocalyptic number.

91309051471 is a deficient number, since it is larger than the sum of its proper divisors (8468986577).

91309051471 is a wasteful number, since it uses less digits than its factorization.

91309051471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6762.

The product of its (nonzero) digits is 34020, while the sum is 40.

The spelling of 91309051471 in words is "ninety-one billion, three hundred nine million, fifty-one thousand, four hundred seventy-one".