91058972424 has 192 divisors, whose sum is σ = 280166400000. Its totient is φ = 24522486912.

The previous prime is 91058972413. The next prime is 91058972449. The reversal of 91058972424 is 42427985019.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4436217 + ... + 4456695.

It is an arithmetic number, because the mean of its divisors is an integer number (1459200000).

Almost surely, 2^91058972424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91058972424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140083200000).

91058972424 is an abundant number, since it is smaller than the sum of its proper divisors (189107427576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91058972424 is a wasteful number, since it uses less digits than its factorization.

91058972424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20720 (or 20709 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 91058972424 in words is "ninety-one billion, fifty-eight million, nine hundred seventy-two thousand, four hundred twenty-four".