123542525305217 has 2 divisors, whose sum is σ = 123542525305218. Its totient is φ = 123542525305216.

The previous prime is 123542525305201. The next prime is 123542525305223. The reversal of 123542525305217 is 712503525245321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110510742983281 + 13031782321936 = 10512409^2 + 3609956^2 .

It is a cyclic number.

It is not a de Polignac number, because 123542525305217 - 2⁴ = 123542525305201 is a prime.

It is not a weakly prime, because it can be changed into another prime (123542525308217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61771262652608 + 61771262652609.

It is an arithmetic number, because the mean of its divisors is an integer number (61771262652609).

Almost surely, 2^{123542525305217} is an apocalyptic number.

It is an amenable number.

123542525305217 is a deficient number, since it is larger than the sum of its proper divisors (1).

123542525305217 is an equidigital number, since it uses as much as digits as its factorization.

123542525305217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520000, while the sum is 47.

The spelling of 123542525305217 in words is "one hundred twenty-three trillion, five hundred forty-two billion, five hundred twenty-five million, three hundred five thousand, two hundred seventeen".