1920798611138 has 8 divisors (see below), whose sum is σ = 3143125000080. Its totient is φ = 873090277780.

The previous prime is 1920798611113. The next prime is 1920798611161. The reversal of 1920798611138 is 8311168970291.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43654513868 + ... + 43654513911.

It is an arithmetic number, because the mean of its divisors is an integer number (392890625010).

Almost surely, 2^{1920798611138} is an apocalyptic number.

1920798611138 is a deficient number, since it is larger than the sum of its proper divisors (1222326388942).

1920798611138 is a wasteful number, since it uses less digits than its factorization.

1920798611138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87309027792.

The product of its (nonzero) digits is 1306368, while the sum is 56.

The spelling of 1920798611138 in words is "one trillion, nine hundred twenty billion, seven hundred ninety-eight million, six hundred eleven thousand, one hundred thirty-eight".