13943856906 has 48 divisors (see below), whose sum is σ = 35330627904. Its totient is φ = 3891307392.

The previous prime is 13943856887. The next prime is 13943856931. The reversal of 13943856906 is 60965834931.

13943856906 is a `hidden beast` number, since 1 + 39 + 43 + 8 + 569 + 0 + 6 = 666.

It is a super-3 number, since 3×13943856906³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1281391 + ... + 1292226.

It is an arithmetic number, because the mean of its divisors is an integer number (736054748).

Almost surely, 2^13943856906 is an apocalyptic number.

13943856906 is an abundant number, since it is smaller than the sum of its proper divisors (21386770998).

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

13943856906 is a wasteful number, since it uses less digits than its factorization.

13943856906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573675 (or 2573672 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 13943856906 in words is "thirteen billion, nine hundred forty-three million, eight hundred fifty-six thousand, nine hundred six".