646504663453342 has 16 divisors (see below), whose sum is σ = 970163969788080. Its totient is φ = 323116689284928.

The previous prime is 646504663453339. The next prime is 646504663453343. The reversal of 646504663453342 is 243354366405646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646504663453343) 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 7 ways as a sum of consecutive naturals, for example, 78287133 + ... + 86150359.

It is an arithmetic number, because the mean of its divisors is an integer number (60635248111755).

Almost surely, 2^{646504663453342} is an apocalyptic number.

646504663453342 is a deficient number, since it is larger than the sum of its proper divisors (323659306334738).

646504663453342 is a wasteful number, since it uses less digits than its factorization.

646504663453342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7880475.

The product of its (nonzero) digits is 447897600, while the sum is 61.

The spelling of 646504663453342 in words is "six hundred forty-six trillion, five hundred four billion, six hundred sixty-three million, four hundred fifty-three thousand, three hundred forty-two".