991241340001441 has 4 divisors (see below), whose sum is σ = 995939166257584. Its totient is φ = 986543513745300.

The previous prime is 991241340001403. The next prime is 991241340001511. The reversal of 991241340001441 is 144100043142199.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 991241340001441 - 2²⁵ = 991241306447009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (991241340007441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2348913127755 + ... + 2348913128176.

It is an arithmetic number, because the mean of its divisors is an integer number (248984791564396).

Almost surely, 2^{991241340001441} is an apocalyptic number.

It is an amenable number.

991241340001441 is a deficient number, since it is larger than the sum of its proper divisors (4697826256143).

991241340001441 is a wasteful number, since it uses less digits than its factorization.

991241340001441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4697826256142.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 991241340001441 in words is "nine hundred ninety-one trillion, two hundred forty-one billion, three hundred forty million, one thousand, four hundred forty-one".