1389025991808 has 256 divisors, whose sum is σ = 5045608377600. Its totient is φ = 366336442368.

The previous prime is 1389025991747. The next prime is 1389025991813. The reversal of 1389025991808 is 8081995209831.

1389025991808 is a `hidden beast` number, since 1 + 38 + 9 + 0 + 2 + 599 + 1 + 8 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1893841 + ... + 2522832.

It is an arithmetic number, because the mean of its divisors is an integer number (19709407725).

Almost surely, 2^{1389025991808} is an apocalyptic number.

1389025991808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1389025991808 is an abundant number, since it is smaller than the sum of its proper divisors (3656582385792).

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

1389025991808 is a wasteful number, since it uses less digits than its factorization.

1389025991808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4416716 (or 4416698 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 63.

The spelling of 1389025991808 in words is "one trillion, three hundred eighty-nine billion, twenty-five million, nine hundred ninety-one thousand, eight hundred eight".