91023345600 has 672 divisors, whose sum is σ = 351450005760. Its totient is φ = 20385792000.

The previous prime is 91023345587. The next prime is 91023345649. The reversal of 91023345600 is 654332019.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 41130094 + ... + 41132306.

It is an arithmetic number, because the mean of its divisors is an integer number (522991080).

Almost surely, 2^91023345600 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 91023345600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175725002880).

91023345600 is an abundant number, since it is smaller than the sum of its proper divisors (260426660160).

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

91023345600 is a wasteful number, since it uses less digits than its factorization.

91023345600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309 (or 2294 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

Adding to 91023345600 its reverse (654332019), we get a palindrome (91677677619).

The spelling of 91023345600 in words is "ninety-one billion, twenty-three million, three hundred forty-five thousand, six hundred".