1837138978922 has 16 divisors (see below), whose sum is σ = 2967716221512. Its totient is φ = 847901675520.

The previous prime is 1837138978897. The next prime is 1837138978981. The reversal of 1837138978922 is 2298798317381.

It is a Cunningham number, because it is equal to 1355411²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1757032431961 + 80106546961 = 1325531^2 + 283031^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2756522 + ... + 3357482.

Almost surely, 2^{1837138978922} is an apocalyptic number.

1837138978922 is a deficient number, since it is larger than the sum of its proper divisors (1130577242590).

1837138978922 is a wasteful number, since it uses less digits than its factorization.

1837138978922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718553.

The product of its digits is 73156608, while the sum is 68.

The spelling of 1837138978922 in words is "one trillion, eight hundred thirty-seven billion, one hundred thirty-eight million, nine hundred seventy-eight thousand, nine hundred twenty-two".