123546553523917 has 2 divisors, whose sum is σ = 123546553523918. Its totient is φ = 123546553523916.

The previous prime is 123546553523891. The next prime is 123546553524029. The reversal of 123546553523917 is 719325355645321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100630169668681 + 22916383855236 = 10031459^2 + 4787106^2 .

It is an emirp because it is prime and its reverse (719325355645321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123546553523917 - 2³¹ = 123544406040269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123546550523917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61773276761958 + 61773276761959.

It is an arithmetic number, because the mean of its divisors is an integer number (61773276761959).

Almost surely, 2^{123546553523917} is an apocalyptic number.

It is an amenable number.

123546553523917 is a deficient number, since it is larger than the sum of its proper divisors (1).

123546553523917 is an equidigital number, since it uses as much as digits as its factorization.

123546553523917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060000, while the sum is 61.

The spelling of 123546553523917 in words is "one hundred twenty-three trillion, five hundred forty-six billion, five hundred fifty-three million, five hundred twenty-three thousand, nine hundred seventeen".