138803445461 has 2 divisors, whose sum is σ = 138803445462. Its totient is φ = 138803445460.

The previous prime is 138803445437. The next prime is 138803445493. The reversal of 138803445461 is 164544308831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101374739236 + 37428706225 = 318394^2 + 193465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138803445461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138803441461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69401722730 + 69401722731.

It is an arithmetic number, because the mean of its divisors is an integer number (69401722731).

Almost surely, 2^138803445461 is an apocalyptic number.

It is an amenable number.

138803445461 is a deficient number, since it is larger than the sum of its proper divisors (1).

138803445461 is an equidigital number, since it uses as much as digits as its factorization.

138803445461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 138803445461 in words is "one hundred thirty-eight billion, eight hundred three million, four hundred forty-five thousand, four hundred sixty-one".