1938871161321 has 8 divisors (see below), whose sum is σ = 2585307286944. Its totient is φ = 1292507904960.

The previous prime is 1938871161193. The next prime is 1938871161371. The reversal of 1938871161321 is 1231611788391.

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

It is not a de Polignac number, because 1938871161321 - 2⁷ = 1938871161193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1938871161371) 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, 18155200 + ... + 18261681.

It is an arithmetic number, because the mean of its divisors is an integer number (323163410868).

Almost surely, 2^{1938871161321} is an apocalyptic number.

It is an amenable number.

1938871161321 is a deficient number, since it is larger than the sum of its proper divisors (646436125623).

1938871161321 is a wasteful number, since it uses less digits than its factorization.

1938871161321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36434631.

The product of its digits is 435456, while the sum is 51.

The spelling of 1938871161321 in words is "one trillion, nine hundred thirty-eight billion, eight hundred seventy-one million, one hundred sixty-one thousand, three hundred twenty-one".