13438642266 has 24 divisors (see below), whose sum is σ = 33276638304. Its totient is φ = 3839612040.

The previous prime is 13438642229. The next prime is 13438642277. The reversal of 13438642266 is 66224683431.

13438642266 is a `hidden beast` number, since 1 + 3 + 4 + 386 + 4 + 2 + 266 = 666.

It is a super-2 number, since 2×13438642266² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53327820 + ... + 53328071.

It is an arithmetic number, because the mean of its divisors is an integer number (1386526596).

Almost surely, 2^13438642266 is an apocalyptic number.

13438642266 is an abundant number, since it is smaller than the sum of its proper divisors (19837996038).

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

13438642266 is a wasteful number, since it uses less digits than its factorization.

13438642266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106655906 (or 106655903 counting only the distinct ones).

The product of its digits is 995328, while the sum is 45.

The spelling of 13438642266 in words is "thirteen billion, four hundred thirty-eight million, six hundred forty-two thousand, two hundred sixty-six".