1408198358521 has 2 divisors, whose sum is σ = 1408198358522. Its totient is φ = 1408198358520.

The previous prime is 1408198358509. The next prime is 1408198358527. The reversal of 1408198358521 is 1258538918041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1176270393600 + 231927964921 = 1084560^2 + 481589^2 .

It is a cyclic number.

It is not a de Polignac number, because 1408198358521 - 2²³ = 1408189969913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1408198358527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 704099179260 + 704099179261.

It is an arithmetic number, because the mean of its divisors is an integer number (704099179261).

Almost surely, 2^{1408198358521} is an apocalyptic number.

It is an amenable number.

1408198358521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1408198358521 is an equidigital number, since it uses as much as digits as its factorization.

1408198358521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2764800, while the sum is 55.

The spelling of 1408198358521 in words is "one trillion, four hundred eight billion, one hundred ninety-eight million, three hundred fifty-eight thousand, five hundred twenty-one".