12642338534 has 16 divisors (see below), whose sum is σ = 21674665248. Its totient is φ = 5417623872.

The previous prime is 12642338519. The next prime is 12642338551. The reversal of 12642338534 is 43583324621.

It is a happy number.

It is a super-3 number, since 3×12642338534³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12642338491 and 12642338500.

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, 131624 + ... + 206420.

It is an arithmetic number, because the mean of its divisors is an integer number (1354666578).

Almost surely, 2^12642338534 is an apocalyptic number.

12642338534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12642338534 is a deficient number, since it is larger than the sum of its proper divisors (9032326714).

12642338534 is a wasteful number, since it uses less digits than its factorization.

12642338534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86879.

The product of its digits is 414720, while the sum is 41.

The spelling of 12642338534 in words is "twelve billion, six hundred forty-two million, three hundred thirty-eight thousand, five hundred thirty-four".