140173242235657 has 2 divisors, whose sum is σ = 140173242235658. Its totient is φ = 140173242235656.

The previous prime is 140173242235591. The next prime is 140173242235669. The reversal of 140173242235657 is 756532242371041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139726087895241 + 447154340416 = 11820579^2 + 668696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140173242235657 is a prime.

It is not a weakly prime, because it can be changed into another prime (140173242230657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70086621117828 + 70086621117829.

It is an arithmetic number, because the mean of its divisors is an integer number (70086621117829).

Almost surely, 2^{140173242235657} is an apocalyptic number.

It is an amenable number.

140173242235657 is a deficient number, since it is larger than the sum of its proper divisors (1).

140173242235657 is an equidigital number, since it uses as much as digits as its factorization.

140173242235657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8467200, while the sum is 52.

The spelling of 140173242235657 in words is "one hundred forty trillion, one hundred seventy-three billion, two hundred forty-two million, two hundred thirty-five thousand, six hundred fifty-seven".