123556505225767 has 2 divisors, whose sum is σ = 123556505225768. Its totient is φ = 123556505225766.

The previous prime is 123556505225683. The next prime is 123556505225773. The reversal of 123556505225767 is 767522505655321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123556505225767 - 2¹¹ = 123556505223719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123556505225267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61778252612883 + 61778252612884.

It is an arithmetic number, because the mean of its divisors is an integer number (61778252612884).

Almost surely, 2^{123556505225767} is an apocalyptic number.

123556505225767 is a deficient number, since it is larger than the sum of its proper divisors (1).

123556505225767 is an equidigital number, since it uses as much as digits as its factorization.

123556505225767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300000, while the sum is 61.

The spelling of 123556505225767 in words is "one hundred twenty-three trillion, five hundred fifty-six billion, five hundred five million, two hundred twenty-five thousand, seven hundred sixty-seven".