1938771442492 has 24 divisors (see below), whose sum is σ = 3396578944752. Its totient is φ = 968320896000.

The previous prime is 1938771442477. The next prime is 1938771442511. The reversal of 1938771442492 is 2942441778391.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1938771442492.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13640263 + ... + 13781665.

It is an arithmetic number, because the mean of its divisors is an integer number (141524122698).

Almost surely, 2^{1938771442492} is an apocalyptic number.

It is an amenable number.

1938771442492 is a deficient number, since it is larger than the sum of its proper divisors (1457807502260).

1938771442492 is a wasteful number, since it uses less digits than its factorization.

1938771442492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145149 (or 145147 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 61.

The spelling of 1938771442492 in words is "one trillion, nine hundred thirty-eight billion, seven hundred seventy-one million, four hundred forty-two thousand, four hundred ninety-two".