138901588507 has 4 divisors (see below), whose sum is σ = 151529005656. Its totient is φ = 126274171360.

The previous prime is 138901588489. The next prime is 138901588541. The reversal of 138901588507 is 705885109831.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138901588507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138901588547) 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, 6313708558 + ... + 6313708579.

It is an arithmetic number, because the mean of its divisors is an integer number (37882251414).

Almost surely, 2^138901588507 is an apocalyptic number.

138901588507 is a deficient number, since it is larger than the sum of its proper divisors (12627417149).

138901588507 is a wasteful number, since it uses less digits than its factorization.

138901588507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12627417148.

The product of its (nonzero) digits is 2419200, while the sum is 55.

The spelling of 138901588507 in words is "one hundred thirty-eight billion, nine hundred one million, five hundred eighty-eight thousand, five hundred seven".