1897672742643 has 4 divisors (see below), whose sum is σ = 2530230323528. Its totient is φ = 1265115161760.

The previous prime is 1897672742593. The next prime is 1897672742659. The reversal of 1897672742643 is 3462472767981.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1897672742643 - 2¹⁸ = 1897672480499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1897672742543) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 316278790438 + ... + 316278790443.

It is an arithmetic number, because the mean of its divisors is an integer number (632557580882).

Almost surely, 2^{1897672742643} is an apocalyptic number.

1897672742643 is a deficient number, since it is larger than the sum of its proper divisors (632557580885).

1897672742643 is an equidigital number, since it uses as much as digits as its factorization.

1897672742643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632557580884.

The product of its digits is 170698752, while the sum is 66.

The spelling of 1897672742643 in words is "one trillion, eight hundred ninety-seven billion, six hundred seventy-two million, seven hundred forty-two thousand, six hundred forty-three".