6490974516842 has 4 divisors (see below), whose sum is σ = 9736461775266. Its totient is φ = 3245487258420.

The previous prime is 6490974516841. The next prime is 6490974516869. The reversal of 6490974516842 is 2486154790946.

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

It can be written as a sum of positive squares in only one way, i.e., 4125127543681 + 2365846973161 = 2031041^2 + 1538131^2 .

It is not an unprimeable number, because it can be changed into a prime (6490974516841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1622743629209 + ... + 1622743629212.

Almost surely, 2^{6490974516842} is an apocalyptic number.

6490974516842 is a deficient number, since it is larger than the sum of its proper divisors (3245487258424).

6490974516842 is a wasteful number, since it uses less digits than its factorization.

6490974516842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3245487258423.

The product of its (nonzero) digits is 104509440, while the sum is 65.

The spelling of 6490974516842 in words is "six trillion, four hundred ninety billion, nine hundred seventy-four million, five hundred sixteen thousand, eight hundred forty-two".