646404460446 has 16 divisors (see below), whose sum is σ = 1293805705104. Its totient is φ = 215302022784.

The previous prime is 646404460441. The next prime is 646404460469. The reversal of 646404460446 is 644064404646.

646404460446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 646404460395 and 646404460404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646404460441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41524245 + ... + 41539808.

It is an arithmetic number, because the mean of its divisors is an integer number (80862856569).

Almost surely, 2^646404460446 is an apocalyptic number.

646404460446 is an abundant number, since it is smaller than the sum of its proper divisors (647401244658).

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

646404460446 is a wasteful number, since it uses less digits than its factorization.

646404460446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83065355.

The product of its (nonzero) digits is 5308416, while the sum is 48.

The spelling of 646404460446 in words is "six hundred forty-six billion, four hundred four million, four hundred sixty thousand, four hundred forty-six".