91341621756 has 288 divisors, whose sum is σ = 298465789440. Its totient is φ = 23646712320.

The previous prime is 91341621743. The next prime is 91341621781. The reversal of 91341621756 is 65712614319.

91341621756 is a `hidden beast` number, since 9 + 13 + 4 + 1 + 621 + 7 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 30825931 + ... + 30828893.

Almost surely, 2^91341621756 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 91341621756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149232894720).

91341621756 is an abundant number, since it is smaller than the sum of its proper divisors (207124167684).

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

91341621756 is a wasteful number, since it uses less digits than its factorization.

91341621756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3342 (or 3323 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The spelling of 91341621756 in words is "ninety-one billion, three hundred forty-one million, six hundred twenty-one thousand, seven hundred fifty-six".