1388778916504 has 32 divisors (see below), whose sum is σ = 2980973365920. Its totient is φ = 594187255296.

The previous prime is 1388778916489. The next prime is 1388778916571. The reversal of 1388778916504 is 4056198778831.

It is a self number, because there is not a number n which added to its sum of digits gives 1388778916504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20877099 + ... + 20943514.

It is an arithmetic number, because the mean of its divisors is an integer number (93155417685).

Almost surely, 2^{1388778916504} is an apocalyptic number.

1388778916504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1388778916504 is an abundant number, since it is smaller than the sum of its proper divisors (1592194449416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1388778916504 is a wasteful number, since it uses less digits than its factorization.

1388778916504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41821219 (or 41821215 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 67.

The spelling of 1388778916504 in words is "one trillion, three hundred eighty-eight billion, seven hundred seventy-eight million, nine hundred sixteen thousand, five hundred four".