138280945357 has 2 divisors, whose sum is σ = 138280945358. Its totient is φ = 138280945356.

The previous prime is 138280945349. The next prime is 138280945381. The reversal of 138280945357 is 753549082831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131546937636 + 6734007721 = 362694^2 + 82061^2 .

It is a cyclic number.

It is not a de Polignac number, because 138280945357 - 2³ = 138280945349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138280945298 and 138280945307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138280945157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69140472678 + 69140472679.

It is an arithmetic number, because the mean of its divisors is an integer number (69140472679).

Almost surely, 2^138280945357 is an apocalyptic number.

It is an amenable number.

138280945357 is a deficient number, since it is larger than the sum of its proper divisors (1).

138280945357 is an equidigital number, since it uses as much as digits as its factorization.

138280945357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 138280945357 in words is "one hundred thirty-eight billion, two hundred eighty million, nine hundred forty-five thousand, three hundred fifty-seven".