1839742289641 has 3 divisors (see below), whose sum is σ = 1839743646013. Its totient is φ = 1839740933270.

The previous prime is 1839742289639. The next prime is 1839742289653. The reversal of 1839742289641 is 1469822479381.

The square root of 1839742289641 is 1356371.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1839742289641 - 2¹ = 1839742289639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1839742289741) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 678186 + ... + 2034556.

Almost surely, 2^{1839742289641} is an apocalyptic number.

1839742289641 is the 1356371-st square number.

1839742289641 is the 678186-th centered octagonal number.

It is an amenable number.

1839742289641 is a deficient number, since it is larger than the sum of its proper divisors (1356372).

1839742289641 is an frugal number, since it uses more digits than its factorization.

1839742289641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712742 (or 1356371 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 64.

Multiplying 1839742289641 by its sum of digits (64), we get a square (117743506537024 = 10850968²).

The spelling of 1839742289641 in words is "one trillion, eight hundred thirty-nine billion, seven hundred forty-two million, two hundred eighty-nine thousand, six hundred forty-one".