138625255567 has 2 divisors, whose sum is σ = 138625255568. Its totient is φ = 138625255566.

The previous prime is 138625255543. The next prime is 138625255597. The reversal of 138625255567 is 765552526831.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138625255567 is a prime.

It is a super-2 number, since 2×138625255567² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138625255597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69312627783 + 69312627784.

It is an arithmetic number, because the mean of its divisors is an integer number (69312627784).

Almost surely, 2^138625255567 is an apocalyptic number.

138625255567 is a deficient number, since it is larger than the sum of its proper divisors (1).

138625255567 is an equidigital number, since it uses as much as digits as its factorization.

138625255567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120000, while the sum is 55.

The spelling of 138625255567 in words is "one hundred thirty-eight billion, six hundred twenty-five million, two hundred fifty-five thousand, five hundred sixty-seven".