646463860146 has 24 divisors (see below), whose sum is σ = 1508415674220. Its totient is φ = 198911956896.

The previous prime is 646463860093. The next prime is 646463860157. The reversal of 646463860146 is 641068364646.

It is a happy number.

646463860146 is a `hidden beast` number, since 6 + 464 + 6 + 38 + 6 + 0 + 146 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 510331640625 + 136132219521 = 714375^2 + 368961^2 .

It is a junction number, because it is equal to n+sod(n) for n = 646463860092 and 646463860101.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1381332801 + ... + 1381333268.

Almost surely, 2^646463860146 is an apocalyptic number.

646463860146 is an abundant number, since it is smaller than the sum of its proper divisors (861951814074).

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

646463860146 is a wasteful number, since it uses less digits than its factorization.

646463860146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762666090 (or 2762666087 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 54.

The spelling of 646463860146 in words is "six hundred forty-six billion, four hundred sixty-three million, eight hundred sixty thousand, one hundred forty-six".