1938688894036 has 24 divisors (see below), whose sum is σ = 3397263442496. Its totient is φ = 968042819520.

The previous prime is 1938688894007. The next prime is 1938688894073. The reversal of 1938688894036 is 6304988868391.

It is a self number, because there is not a number n which added to its sum of digits gives 1938688894036.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12715696 + ... + 12867256.

Almost surely, 2^{1938688894036} is an apocalyptic number.

It is an amenable number.

1938688894036 is a deficient number, since it is larger than the sum of its proper divisors (1458574548460).

1938688894036 is a wasteful number, since it uses less digits than its factorization.

1938688894036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155839 (or 155837 counting only the distinct ones).

The product of its (nonzero) digits is 429981696, while the sum is 73.

The spelling of 1938688894036 in words is "one trillion, nine hundred thirty-eight billion, six hundred eighty-eight million, eight hundred ninety-four thousand, thirty-six".