123451103549 has 2 divisors, whose sum is σ = 123451103550. Its totient is φ = 123451103548.

The previous prime is 123451103537. The next prime is 123451103561. The reversal of 123451103549 is 945301154321.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (123451103537) and next prime (123451103561).

It can be written as a sum of positive squares in only one way, i.e., 122512600324 + 938503225 = 350018^2 + 30635^2 .

It is a cyclic number.

It is not a de Polignac number, because 123451103549 - 2²⁸ = 123182668093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123451103569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61725551774 + 61725551775.

It is an arithmetic number, because the mean of its divisors is an integer number (61725551775).

Almost surely, 2^123451103549 is an apocalyptic number.

It is an amenable number.

123451103549 is a deficient number, since it is larger than the sum of its proper divisors (1).

123451103549 is an equidigital number, since it uses as much as digits as its factorization.

123451103549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 123451103549 in words is "one hundred twenty-three billion, four hundred fifty-one million, one hundred three thousand, five hundred forty-nine".