91442261250 has 90 divisors (see below), whose sum is σ = 247663743327. Its totient is φ = 24376050000.

The previous prime is 91442261237. The next prime is 91442261327. The reversal of 91442261250 is 5216224419.

It is a happy number.

91442261250 is a `hidden beast` number, since 9 + 14 + 4 + 22 + 612 + 5 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 21141450801 + 70300810449 = 145401^2 + 265143^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=213825.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 32072325 + ... + 32075175.

Almost surely, 2^91442261250 is an apocalyptic number.

91442261250 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 91442261250

91442261250 is an abundant number, since it is smaller than the sum of its proper divisors (156221482077).

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

91442261250 is an frugal number, since it uses more digits than its factorization.

91442261250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5730 (or 2861 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 91442261250 its reverse (5216224419), we get a palindrome (96658485669).

The spelling of 91442261250 in words is "ninety-one billion, four hundred forty-two million, two hundred sixty-one thousand, two hundred fifty".