138340720100 has 72 divisors (see below), whose sum is σ = 330732956736. Its totient is φ = 49807600000.

The previous prime is 138340720099. The next prime is 138340720109. The reversal of 138340720100 is 1027043831.

It is not an unprimeable number, because it can be changed into a prime (138340720109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 511496 + ... + 733695.

It is an arithmetic number, because the mean of its divisors is an integer number (4593513288).

Almost surely, 2^138340720100 is an apocalyptic number.

138340720100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138340720100 is an abundant number, since it is smaller than the sum of its proper divisors (192392236636).

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

138340720100 is a wasteful number, since it uses less digits than its factorization.

138340720100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245317 (or 1245310 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 138340720100 its reverse (1027043831), we get a palindrome (139367763931).

The spelling of 138340720100 in words is "one hundred thirty-eight billion, three hundred forty million, seven hundred twenty thousand, one hundred".