91440258001 has 2 divisors, whose sum is σ = 91440258002. Its totient is φ = 91440258000.

The previous prime is 91440257969. The next prime is 91440258023. The reversal of 91440258001 is 10085204419.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90948083776 + 492174225 = 301576^2 + 22185^2 .

It is a cyclic number.

It is not a de Polignac number, because 91440258001 - 2⁵ = 91440257969 is a prime.

It is a super-2 number, since 2×91440258001² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91440258061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45720129000 + 45720129001.

It is an arithmetic number, because the mean of its divisors is an integer number (45720129001).

Almost surely, 2^91440258001 is an apocalyptic number.

It is an amenable number.

91440258001 is a deficient number, since it is larger than the sum of its proper divisors (1).

91440258001 is an equidigital number, since it uses as much as digits as its factorization.

91440258001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 91440258001 in words is "ninety-one billion, four hundred forty million, two hundred fifty-eight thousand, one".