138366313205428 has 96 divisors (see below), whose sum is σ = 302167070650368. Its totient is φ = 53859510403200.

The previous prime is 138366313205411. The next prime is 138366313205447. The reversal of 138366313205428 is 824502313663831.

It is a super-3 number, since 3×138366313205428³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6808350475 + ... + 6808370797.

It is an arithmetic number, because the mean of its divisors is an integer number (3147573652608).

Almost surely, 2^{138366313205428} is an apocalyptic number.

It is an amenable number.

138366313205428 is an abundant number, since it is smaller than the sum of its proper divisors (163800757444940).

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

138366313205428 is a wasteful number, since it uses less digits than its factorization.

138366313205428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39533 (or 39531 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 55.

The spelling of 138366313205428 in words is "one hundred thirty-eight trillion, three hundred sixty-six billion, three hundred thirteen million, two hundred five thousand, four hundred twenty-eight".