6501442487669 has 2 divisors, whose sum is σ = 6501442487670. Its totient is φ = 6501442487668.

The previous prime is 6501442487641. The next prime is 6501442487717. The reversal of 6501442487669 is 9667842441056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3817776011569 + 2683666476100 = 1953913^2 + 1638190^2 .

It is a cyclic number.

It is not a de Polignac number, because 6501442487669 - 2²⁸ = 6501174052213 is a prime.

It is a super-2 number, since 2×6501442487669² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6501442487609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3250721243834 + 3250721243835.

It is an arithmetic number, because the mean of its divisors is an integer number (3250721243835).

Almost surely, 2^{6501442487669} is an apocalyptic number.

It is an amenable number.

6501442487669 is a deficient number, since it is larger than the sum of its proper divisors (1).

6501442487669 is an equidigital number, since it uses as much as digits as its factorization.

6501442487669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69672960, while the sum is 62.

The spelling of 6501442487669 in words is "six trillion, five hundred one billion, four hundred forty-two million, four hundred eighty-seven thousand, six hundred sixty-nine".