646554484455646 has 32 divisors (see below), whose sum is σ = 1062168431637600. Its totient is φ = 293343134031360.

The previous prime is 646554484455637. The next prime is 646554484455647.

It is a happy number.

646554484455646 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646554484455647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44734666 + ... + 57395986.

It is an arithmetic number, because the mean of its divisors is an integer number (33192763488675).

Almost surely, 2^{646554484455646} is an apocalyptic number.

646554484455646 is a deficient number, since it is larger than the sum of its proper divisors (415613947181954).

646554484455646 is a wasteful number, since it uses less digits than its factorization.

646554484455646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12694684.

The product of its digits is 26542080000, while the sum is 76.

The spelling of 646554484455646 in words is "six hundred forty-six trillion, five hundred fifty-four billion, four hundred eighty-four million, four hundred fifty-five thousand, six hundred forty-six".