1878403744138 has 8 divisors (see below), whose sum is σ = 2940110208288. Its totient is φ = 898367008044.

The previous prime is 1878403744121. The next prime is 1878403744159. The reversal of 1878403744138 is 8314473048781.

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

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 3 ways as a sum of consecutive naturals, for example, 20417431956 + ... + 20417432047.

It is an arithmetic number, because the mean of its divisors is an integer number (367513776036).

Almost surely, 2^{1878403744138} is an apocalyptic number.

1878403744138 is a deficient number, since it is larger than the sum of its proper divisors (1061706464150).

1878403744138 is a wasteful number, since it uses less digits than its factorization.

1878403744138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40834864028.

The product of its (nonzero) digits is 14450688, while the sum is 58.

The spelling of 1878403744138 in words is "one trillion, eight hundred seventy-eight billion, four hundred three million, seven hundred forty-four thousand, one hundred thirty-eight".