138015257503 has 16 divisors (see below), whose sum is σ = 147001910400. Its totient is φ = 129127219200.

The previous prime is 138015257489. The next prime is 138015257521. The reversal of 138015257503 is 305752510831.

It is a cyclic number.

It is not a de Polignac number, because 138015257503 - 2⁹ = 138015256991 is a prime.

It is a super-2 number, since 2×138015257503² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138015257563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2035183 + ... + 2101903.

It is an arithmetic number, because the mean of its divisors is an integer number (9187619400).

Almost surely, 2^138015257503 is an apocalyptic number.

138015257503 is a deficient number, since it is larger than the sum of its proper divisors (8986652897).

138015257503 is a wasteful number, since it uses less digits than its factorization.

138015257503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67458.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 138015257503 in words is "one hundred thirty-eight billion, fifteen million, two hundred fifty-seven thousand, five hundred three".