91800441936 has 160 divisors (see below), whose sum is σ = 301834649600. Its totient is φ = 26168572800.

The previous prime is 91800441919. The next prime is 91800441937. The reversal of 91800441936 is 63914400819.

It is a super-2 number, since 2×91800441936² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91800441891 and 91800441900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91800441937) 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, 1292961 + ... + 1362111.

It is an arithmetic number, because the mean of its divisors is an integer number (1886466560).

Almost surely, 2^91800441936 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 91800441936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150917324800).

91800441936 is an abundant number, since it is smaller than the sum of its proper divisors (210034207664).

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

91800441936 is a wasteful number, since it uses less digits than its factorization.

91800441936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69614 (or 69602 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 91800441936 in words is "ninety-one billion, eight hundred million, four hundred forty-one thousand, nine hundred thirty-six".