138400425133 has 4 divisors (see below), whose sum is σ = 142864955008. Its totient is φ = 133935895260.

The previous prime is 138400425067. The next prime is 138400425151. The reversal of 138400425133 is 331524004831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331524004831 = 36067 ⋅9191893.

It is a cyclic number.

It is not a de Polignac number, because 138400425133 - 2¹³ = 138400416941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138400425533) 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, 2232264891 + ... + 2232264952.

It is an arithmetic number, because the mean of its divisors is an integer number (35716238752).

Almost surely, 2^138400425133 is an apocalyptic number.

It is an amenable number.

138400425133 is a deficient number, since it is larger than the sum of its proper divisors (4464529875).

138400425133 is an equidigital number, since it uses as much as digits as its factorization.

138400425133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4464529874.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 138400425133 its reverse (331524004831), we get a palindrome (469924429964).

The spelling of 138400425133 in words is "one hundred thirty-eight billion, four hundred million, four hundred twenty-five thousand, one hundred thirty-three".