646306436341632 has 64 divisors (see below), whose sum is σ = 1872819787138560. Its totient is φ = 195850435253760.

The previous prime is 646306436341583. The next prime is 646306436341681. The reversal of 646306436341632 is 236143634603646.

It is an interprime number because it is at equal distance from previous prime (646306436341583) and next prime (646306436341681).

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76504072048 + ... + 76504080495.

It is an arithmetic number, because the mean of its divisors is an integer number (29262809174040).

Almost surely, 2^{646306436341632} is an apocalyptic number.

It is an amenable number.

646306436341632 is an abundant number, since it is smaller than the sum of its proper divisors (1226513350796928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646306436341632 is a wasteful number, since it uses less digits than its factorization.

646306436341632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153008152571 (or 153008152559 counting only the distinct ones).

The product of its (nonzero) digits is 80621568, while the sum is 57.

The spelling of 646306436341632 in words is "six hundred forty-six trillion, three hundred six billion, four hundred thirty-six million, three hundred forty-one thousand, six hundred thirty-two".