138732315640 has 32 divisors (see below), whose sum is σ = 316423712880. Its totient is φ = 54732748032.

The previous prime is 138732315593. The next prime is 138732315641. The reversal of 138732315640 is 46513237831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138732315641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23752614 + ... + 23758453.

Almost surely, 2^138732315640 is an apocalyptic number.

138732315640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138732315640 is an abundant number, since it is smaller than the sum of its proper divisors (177691397240).

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

138732315640 is a wasteful number, since it uses less digits than its factorization.

138732315640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47511151 (or 47511147 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 138732315640 in words is "one hundred thirty-eight billion, seven hundred thirty-two million, three hundred fifteen thousand, six hundred forty".