1918541408441 has 8 divisors (see below), whose sum is σ = 2198830139904. Its totient is φ = 1639805523840.

The previous prime is 1918541408411. The next prime is 1918541408477. The reversal of 1918541408441 is 1448041458191.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1918541408441 is a prime.

It is a super-2 number, since 2×1918541408441² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1918541408441.

It is not an unprimeable number, because it can be changed into a prime (1918541408411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388209065 + ... + 388214006.

It is an arithmetic number, because the mean of its divisors is an integer number (274853767488).

Almost surely, 2^{1918541408441} is an apocalyptic number.

It is an amenable number.

1918541408441 is a deficient number, since it is larger than the sum of its proper divisors (280288731463).

1918541408441 is an equidigital number, since it uses as much as digits as its factorization.

1918541408441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776423431.

The product of its (nonzero) digits is 737280, while the sum is 50.

The spelling of 1918541408441 in words is "one trillion, nine hundred eighteen billion, five hundred forty-one million, four hundred eight thousand, four hundred forty-one".