138520700274 has 64 divisors (see below), whose sum is σ = 310911270912. Its totient is φ = 40782864000.

The previous prime is 138520700209. The next prime is 138520700303. The reversal of 138520700274 is 472007025831.

It is a Curzon 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, 261999 + ... + 587949.

It is an arithmetic number, because the mean of its divisors is an integer number (4857988608).

Almost surely, 2^138520700274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138520700274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155455635456).

138520700274 is an abundant number, since it is smaller than the sum of its proper divisors (172390570638).

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

138520700274 is a wasteful number, since it uses less digits than its factorization.

138520700274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326151.

The product of its (nonzero) digits is 94080, while the sum is 39.

The spelling of 138520700274 in words is "one hundred thirty-eight billion, five hundred twenty million, seven hundred thousand, two hundred seventy-four".