1438143966819 has 24 divisors (see below), whose sum is σ = 2374878860640. Its totient is φ = 821519653248.

The previous prime is 1438143966769. The next prime is 1438143966839. The reversal of 1438143966819 is 9186693418341.

1438143966819 is a `hidden beast` number, since 1 + 43 + 81 + 439 + 6 + 6 + 81 + 9 = 666.

It is not a de Polignac number, because 1438143966819 - 2⁹ = 1438143966307 is a prime.

It is a super-2 number, since 2×1438143966819² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1438143966839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3657292 + ... + 4031385.

It is an arithmetic number, because the mean of its divisors is an integer number (98953285860).

Almost surely, 2^{1438143966819} is an apocalyptic number.

1438143966819 is a deficient number, since it is larger than the sum of its proper divisors (936734893821).

1438143966819 is a wasteful number, since it uses less digits than its factorization.

1438143966819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7691659 (or 7691656 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The spelling of 1438143966819 in words is "one trillion, four hundred thirty-eight billion, one hundred forty-three million, nine hundred sixty-six thousand, eight hundred nineteen".