6442651321487 has 2 divisors, whose sum is σ = 6442651321488. Its totient is φ = 6442651321486.

The previous prime is 6442651321439. The next prime is 6442651321649. The reversal of 6442651321487 is 7841231562446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6442651321487 - 2²² = 6442647127183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6442651321417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3221325660743 + 3221325660744.

It is an arithmetic number, because the mean of its divisors is an integer number (3221325660744).

Almost surely, 2^{6442651321487} is an apocalyptic number.

6442651321487 is a deficient number, since it is larger than the sum of its proper divisors (1).

6442651321487 is an equidigital number, since it uses as much as digits as its factorization.

6442651321487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 53.

The spelling of 6442651321487 in words is "six trillion, four hundred forty-two billion, six hundred fifty-one million, three hundred twenty-one thousand, four hundred eighty-seven".