91224784623 has 16 divisors (see below), whose sum is σ = 139331736576. Its totient is φ = 52007495520.

The previous prime is 91224784621. The next prime is 91224784723. The reversal of 91224784623 is 32648742219.

It is not a de Polignac number, because 91224784623 - 2¹ = 91224784621 is a prime.

It is a super-2 number, since 2×91224784623² (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 (91224784621) 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, 5030436 + ... + 5048537.

It is an arithmetic number, because the mean of its divisors is an integer number (8708233536).

Almost surely, 2^91224784623 is an apocalyptic number.

91224784623 is a deficient number, since it is larger than the sum of its proper divisors (48106951953).

91224784623 is a wasteful number, since it uses less digits than its factorization.

91224784623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10079414.

The product of its digits is 1161216, while the sum is 48.

The spelling of 91224784623 in words is "ninety-one billion, two hundred twenty-four million, seven hundred eighty-four thousand, six hundred twenty-three".