13943120638 has 8 divisors (see below), whose sum is σ = 20915215632. Its totient is φ = 6971382096.

The previous prime is 13943120623. The next prime is 13943120647. The reversal of 13943120638 is 83602134931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13943120638² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13943120638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55831 + ... + 176077.

It is an arithmetic number, because the mean of its divisors is an integer number (2614401954).

Almost surely, 2^13943120638 is an apocalyptic number.

13943120638 is a deficient number, since it is larger than the sum of its proper divisors (6972094994).

13943120638 is a wasteful number, since it uses less digits than its factorization.

13943120638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178226.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 13943120638 in words is "thirteen billion, nine hundred forty-three million, one hundred twenty thousand, six hundred thirty-eight".