91444442001 has 8 divisors (see below), whose sum is σ = 133010097504. Its totient is φ = 55420873920.

The previous prime is 91444441967. The next prime is 91444442017. The reversal of 91444442001 is 10024444419.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91444442001 - 2⁷ = 91444441873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 2771043697 = 91444442001 / (9 + 1 + 4 + 4 + 4 + 4 + 4 + 2 + 0 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (91444442081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1385521816 + ... + 1385521881.

It is an arithmetic number, because the mean of its divisors is an integer number (16626262188).

Almost surely, 2^91444442001 is an apocalyptic number.

It is an amenable number.

91444442001 is a deficient number, since it is larger than the sum of its proper divisors (41565655503).

91444442001 is a wasteful number, since it uses less digits than its factorization.

91444442001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771043711.

The product of its (nonzero) digits is 18432, while the sum is 33.

The spelling of 91444442001 in words is "ninety-one billion, four hundred forty-four million, four hundred forty-two thousand, one".