1982374923538 has 4 divisors (see below), whose sum is σ = 2973562385310. Its totient is φ = 991187461768.

The previous prime is 1982374923527. The next prime is 1982374923539. The reversal of 1982374923538 is 8353294732891.

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

It can be written as a sum of positive squares in only one way, i.e., 1102367703969 + 880007219569 = 1049937^2 + 938087^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1982374923538.

It is not an unprimeable number, because it can be changed into a prime (1982374923539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495593730883 + ... + 495593730886.

Almost surely, 2^{1982374923538} is an apocalyptic number.

1982374923538 is a deficient number, since it is larger than the sum of its proper divisors (991187461772).

1982374923538 is an equidigital number, since it uses as much as digits as its factorization.

1982374923538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991187461771.

The product of its digits is 78382080, while the sum is 64.

The spelling of 1982374923538 in words is "one trillion, nine hundred eighty-two billion, three hundred seventy-four million, nine hundred twenty-three thousand, five hundred thirty-eight".