138255742813326 has 64 divisors (see below), whose sum is σ = 281878318656000. Its totient is φ = 45199566864000.

The previous prime is 138255742813313. The next prime is 138255742813343. The reversal of 138255742813326 is 623318247552831.

It is a happy number.

It is a super-2 number, since 2×138255742813326² (a number of 29 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 138255742813326.

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, 279227125 + ... + 279721823.

It is an arithmetic number, because the mean of its divisors is an integer number (4404348729000).

Almost surely, 2^{138255742813326} is an apocalyptic number.

138255742813326 is an abundant number, since it is smaller than the sum of its proper divisors (143622575842674).

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

138255742813326 is a wasteful number, since it uses less digits than its factorization.

138255742813326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499145.

The product of its digits is 58060800, while the sum is 60.

The spelling of 138255742813326 in words is "one hundred thirty-eight trillion, two hundred fifty-five billion, seven hundred forty-two million, eight hundred thirteen thousand, three hundred twenty-six".