1398106746878 has 16 divisors (see below), whose sum is σ = 2148343948800. Its totient is φ = 681992630400.

The previous prime is 1398106746787. The next prime is 1398106746887. The reversal of 1398106746878 is 8786476018931.

It is a Curzon number.

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, 8665283 + ... + 8825153.

It is an arithmetic number, because the mean of its divisors is an integer number (134271496800).

Almost surely, 2^{1398106746878} is an apocalyptic number.

1398106746878 is a deficient number, since it is larger than the sum of its proper divisors (750237201922).

1398106746878 is a wasteful number, since it uses less digits than its factorization.

1398106746878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266563.

The product of its (nonzero) digits is 97542144, while the sum is 68.

The spelling of 1398106746878 in words is "one trillion, three hundred ninety-eight billion, one hundred six million, seven hundred forty-six thousand, eight hundred seventy-eight".