1878396338116 has 27 divisors (see below), whose sum is σ = 3469405773519. Its totient is φ = 889742016648.

The previous prime is 1878396338113. The next prime is 1878396338129. The reversal of 1878396338116 is 6118336938781.

The square root of 1878396338116 is 1370546.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1878396338111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 52062715 + ... + 52098781.

Almost surely, 2^{1878396338116} is an apocalyptic number.

1878396338116 is the 1370546-th square number.

It is an amenable number.

1878396338116 is a deficient number, since it is larger than the sum of its proper divisors (1591009435403).

1878396338116 is an frugal number, since it uses more digits than its factorization.

1878396338116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72176 (or 36088 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 64.

Multiplying 1878396338116 by its sum of digits (64), we get a square (120217365639424 = 10964368²).

The spelling of 1878396338116 in words is "one trillion, eight hundred seventy-eight billion, three hundred ninety-six million, three hundred thirty-eight thousand, one hundred sixteen".