17442458957921 has 2 divisors, whose sum is σ = 17442458957922. Its totient is φ = 17442458957920.

The previous prime is 17442458957867. The next prime is 17442458957981. The reversal of 17442458957921 is 12975985424471.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9772882597921 + 7669576360000 = 3126161^2 + 2769400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17442458957921 is a prime.

It is not a weakly prime, because it can be changed into another prime (17442458957981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8721229478960 + 8721229478961.

It is an arithmetic number, because the mean of its divisors is an integer number (8721229478961).

Almost surely, 2^{17442458957921} is an apocalyptic number.

It is an amenable number.

17442458957921 is a deficient number, since it is larger than the sum of its proper divisors (1).

17442458957921 is an equidigital number, since it uses as much as digits as its factorization.

17442458957921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 203212800, while the sum is 68.

The spelling of 17442458957921 in words is "seventeen trillion, four hundred forty-two billion, four hundred fifty-eight million, nine hundred fifty-seven thousand, nine hundred twenty-one".