138280933081 has 2 divisors, whose sum is σ = 138280933082. Its totient is φ = 138280933080.

The previous prime is 138280933069. The next prime is 138280933099. The reversal of 138280933081 is 180339082831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129876627456 + 8404305625 = 360384^2 + 91675^2 .

It is a cyclic number.

It is not a de Polignac number, because 138280933081 - 2²⁵ = 138247378649 is a prime.

It is a super-2 number, since 2×138280933081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138280933381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69140466540 + 69140466541.

It is an arithmetic number, because the mean of its divisors is an integer number (69140466541).

Almost surely, 2^138280933081 is an apocalyptic number.

It is an amenable number.

138280933081 is a deficient number, since it is larger than the sum of its proper divisors (1).

138280933081 is an equidigital number, since it uses as much as digits as its factorization.

138280933081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 138280933081 in words is "one hundred thirty-eight billion, two hundred eighty million, nine hundred thirty-three thousand, eighty-one".