6493990225361 has 4 divisors (see below), whose sum is σ = 6494043852900. Its totient is φ = 6493936597824.

The previous prime is 6493990225337. The next prime is 6493990225363. The reversal of 6493990225361 is 1635220993946.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1721753368336 + 4772236857025 = 1312156^2 + 2184545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6493990225361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6493990225361.

It is not an unprimeable number, because it can be changed into a prime (6493990225363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26631716 + ... + 26874453.

It is an arithmetic number, because the mean of its divisors is an integer number (1623510963225).

Almost surely, 2^{6493990225361} is an apocalyptic number.

It is an amenable number.

6493990225361 is a deficient number, since it is larger than the sum of its proper divisors (53627539).

6493990225361 is a wasteful number, since it uses less digits than its factorization.

6493990225361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53627538.

The product of its (nonzero) digits is 18895680, while the sum is 59.

The spelling of 6493990225361 in words is "six trillion, four hundred ninety-three billion, nine hundred ninety million, two hundred twenty-five thousand, three hundred sixty-one".