91424366208 has 288 divisors, whose sum is σ = 316594102500. Its totient is φ = 25220063232.

The previous prime is 91424366129. The next prime is 91424366273. The reversal of 91424366208 is 80266342419.

91424366208 is a `hidden beast` number, since 9 + 1 + 4 + 2 + 436 + 6 + 208 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 87327342144 + 4097024064 = 295512^2 + 64008^2 .

It is a tau number, because it is divible by the number of its divisors (288).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1609068 + ... + 1664916.

Almost surely, 2^91424366208 is an apocalyptic number.

91424366208 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91424366208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158297051250).

91424366208 is an abundant number, since it is smaller than the sum of its proper divisors (225169736292).

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

91424366208 is a wasteful number, since it uses less digits than its factorization.

91424366208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55912 (or 55890 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 91424366208 in words is "ninety-one billion, four hundred twenty-four million, three hundred sixty-six thousand, two hundred eight".