91224641218708 has 96 divisors (see below), whose sum is σ = 172027178459136. Its totient is φ = 42265502977152.

The previous prime is 91224641218681. The next prime is 91224641218709. The reversal of 91224641218708 is 80781214642219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91224641218709) 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, 34278885 + ... + 36844147.

It is an arithmetic number, because the mean of its divisors is an integer number (1791949775616).

Almost surely, 2^{91224641218708} is an apocalyptic number.

It is an amenable number.

91224641218708 is a deficient number, since it is larger than the sum of its proper divisors (80802537240428).

91224641218708 is a wasteful number, since it uses less digits than its factorization.

91224641218708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565493 (or 2565491 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 91224641218708 in words is "ninety-one trillion, two hundred twenty-four billion, six hundred forty-one million, two hundred eighteen thousand, seven hundred eight".