123545510057 has 2 divisors, whose sum is σ = 123545510058. Its totient is φ = 123545510056.

The previous prime is 123545510047. The next prime is 123545510069. The reversal of 123545510057 is 750015545321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103676916121 + 19868593936 = 321989^2 + 140956^2 .

It is a cyclic number.

It is not a de Polignac number, because 123545510057 - 2¹⁶ = 123545444521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123545510057.

It is not a weakly prime, because it can be changed into another prime (123545510047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61772755028 + 61772755029.

It is an arithmetic number, because the mean of its divisors is an integer number (61772755029).

Almost surely, 2^123545510057 is an apocalyptic number.

It is an amenable number.

123545510057 is a deficient number, since it is larger than the sum of its proper divisors (1).

123545510057 is an equidigital number, since it uses as much as digits as its factorization.

123545510057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105000, while the sum is 38.

The spelling of 123545510057 in words is "one hundred twenty-three billion, five hundred forty-five million, five hundred ten thousand, fifty-seven".