17986401297457 has 2 divisors, whose sum is σ = 17986401297458. Its totient is φ = 17986401297456.

The previous prime is 17986401297421. The next prime is 17986401297499. The reversal of 17986401297457 is 75479210468971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11246894542321 + 6739506755136 = 3353639^2 + 2596056^2 .

It is a cyclic number.

It is not a de Polignac number, because 17986401297457 - 2²³ = 17986392908849 is a prime.

It is not a weakly prime, because it can be changed into another prime (17986201297457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8993200648728 + 8993200648729.

It is an arithmetic number, because the mean of its divisors is an integer number (8993200648729).

Almost surely, 2^{17986401297457} is an apocalyptic number.

It is an amenable number.

17986401297457 is a deficient number, since it is larger than the sum of its proper divisors (1).

17986401297457 is an equidigital number, since it uses as much as digits as its factorization.

17986401297457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 213373440, while the sum is 70.

The spelling of 17986401297457 in words is "seventeen trillion, nine hundred eighty-six billion, four hundred one million, two hundred ninety-seven thousand, four hundred fifty-seven".