19444444444444 has 6 divisors (see below), whose sum is σ = 34027777777784. Its totient is φ = 9722222222220.

The previous prime is 19444444444429. The next prime is 19444444444459. The reversal of 19444444444444 is 44444444444491.

It is an interprime number because it is at equal distance from previous prime (19444444444429) and next prime (19444444444459).

19444444444444 is a modest number, since divided by 4444444 gives 1944444 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2430555555552 + ... + 2430555555559.

Almost surely, 2^{19444444444444} is an apocalyptic number.

It is an amenable number.

19444444444444 is a deficient number, since it is larger than the sum of its proper divisors (14583333333340).

19444444444444 is a wasteful number, since it uses less digits than its factorization.

19444444444444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4861111111115 (or 4861111111113 counting only the distinct ones).

The product of its digits is 150994944, while the sum is 58.

The spelling of 19444444444444 in words is "nineteen trillion, four hundred forty-four billion, four hundred forty-four million, four hundred forty-four thousand, four hundred forty-four".