138725821753 has 2 divisors, whose sum is σ = 138725821754. Its totient is φ = 138725821752.

The previous prime is 138725821727. The next prime is 138725821771. The reversal of 138725821753 is 357128527831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74208297744 + 64517524009 = 272412^2 + 254003^2 .

It is a cyclic number.

It is not a de Polignac number, because 138725821753 - 2²⁵ = 138692267321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138725821753.

It is not a weakly prime, because it can be changed into another prime (138725821253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69362910876 + 69362910877.

It is an arithmetic number, because the mean of its divisors is an integer number (69362910877).

Almost surely, 2^138725821753 is an apocalyptic number.

It is an amenable number.

138725821753 is a deficient number, since it is larger than the sum of its proper divisors (1).

138725821753 is an equidigital number, since it uses as much as digits as its factorization.

138725821753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2822400, while the sum is 52.

The spelling of 138725821753 in words is "one hundred thirty-eight billion, seven hundred twenty-five million, eight hundred twenty-one thousand, seven hundred fifty-three".