1938823556542 has 4 divisors (see below), whose sum is σ = 2908235334816. Its totient is φ = 969411778270.

The previous prime is 1938823556521. The next prime is 1938823556609. The reversal of 1938823556542 is 2456553288391.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484705889134 + ... + 484705889137.

It is an arithmetic number, because the mean of its divisors is an integer number (727058833704).

Almost surely, 2^{1938823556542} is an apocalyptic number.

1938823556542 is a deficient number, since it is larger than the sum of its proper divisors (969411778274).

1938823556542 is an equidigital number, since it uses as much as digits as its factorization.

1938823556542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969411778273.

The product of its digits is 62208000, while the sum is 61.

The spelling of 1938823556542 in words is "one trillion, nine hundred thirty-eight billion, eight hundred twenty-three million, five hundred fifty-six thousand, five hundred forty-two".