138831622751 has 2 divisors, whose sum is σ = 138831622752. Its totient is φ = 138831622750.

The previous prime is 138831622729. The next prime is 138831622757. The reversal of 138831622751 is 157226138831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138831622751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138831622696 and 138831622705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138831622757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69415811375 + 69415811376.

It is an arithmetic number, because the mean of its divisors is an integer number (69415811376).

Almost surely, 2^138831622751 is an apocalyptic number.

138831622751 is a deficient number, since it is larger than the sum of its proper divisors (1).

138831622751 is an equidigital number, since it uses as much as digits as its factorization.

138831622751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The spelling of 138831622751 in words is "one hundred thirty-eight billion, eight hundred thirty-one million, six hundred twenty-two thousand, seven hundred fifty-one".