123081637057 has 2 divisors, whose sum is σ = 123081637058. Its totient is φ = 123081637056.

The previous prime is 123081637037. The next prime is 123081637103. The reversal of 123081637057 is 750736180321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102708071361 + 20373565696 = 320481^2 + 142736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123081637057 is a prime.

It is not a weakly prime, because it can be changed into another prime (123081637037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61540818528 + 61540818529.

It is an arithmetic number, because the mean of its divisors is an integer number (61540818529).

Almost surely, 2^123081637057 is an apocalyptic number.

It is an amenable number.

123081637057 is a deficient number, since it is larger than the sum of its proper divisors (1).

123081637057 is an equidigital number, since it uses as much as digits as its factorization.

123081637057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 123081637057 in words is "one hundred twenty-three billion, eighty-one million, six hundred thirty-seven thousand, fifty-seven".