91239454680 has 384 divisors, whose sum is σ = 305794621440. Its totient is φ = 21760076800.

The previous prime is 91239454667. The next prime is 91239454703. The reversal of 91239454680 is 8645493219.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 463144342 + ... + 463144538.

It is an arithmetic number, because the mean of its divisors is an integer number (796340160).

Almost surely, 2^91239454680 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 91239454680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152897310720).

91239454680 is an abundant number, since it is smaller than the sum of its proper divisors (214555166760).

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

91239454680 is a wasteful number, since it uses less digits than its factorization.

91239454680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 576 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 91239454680 in words is "ninety-one billion, two hundred thirty-nine million, four hundred fifty-four thousand, six hundred eighty".