138212597611 has 4 divisors (see below), whose sum is σ = 150777379224. Its totient is φ = 125647816000.

The previous prime is 138212597603. The next prime is 138212597639. The reversal of 138212597611 is 116795212831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138212597611 - 2³ = 138212597603 is a prime.

It is a super-4 number, since 4×138212597611⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138212597641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6282390790 + ... + 6282390811.

It is an arithmetic number, because the mean of its divisors is an integer number (37694344806).

Almost surely, 2^138212597611 is an apocalyptic number.

138212597611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138212597611 is a deficient number, since it is larger than the sum of its proper divisors (12564781613).

138212597611 is a wasteful number, since it uses less digits than its factorization.

138212597611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12564781612.

The product of its digits is 181440, while the sum is 46.

The spelling of 138212597611 in words is "one hundred thirty-eight billion, two hundred twelve million, five hundred ninety-seven thousand, six hundred eleven".