91724242719 has 32 divisors (see below), whose sum is σ = 132363477504. Its totient is φ = 56346364800.

The previous prime is 91724242711. The next prime is 91724242733.

91724242719 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 91724242719 - 2³ = 91724242711 is a prime.

It is a super-2 number, since 2×91724242719² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91724242711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79992 + ... + 435714.

It is an arithmetic number, because the mean of its divisors is an integer number (4136358672).

Almost surely, 2^91724242719 is an apocalyptic number.

91724242719 is a deficient number, since it is larger than the sum of its proper divisors (40639234785).

91724242719 is a wasteful number, since it uses less digits than its factorization.

91724242719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355887.

The product of its digits is 508032, while the sum is 48.

The spelling of 91724242719 in words is "ninety-one billion, seven hundred twenty-four million, two hundred forty-two thousand, seven hundred nineteen".