646654644030042 has 48 divisors (see below), whose sum is σ = 1462031674983360. Its totient is φ = 206175528985536.

The previous prime is 646654644030007. The next prime is 646654644030077. The reversal of 646654644030042 is 240030446456646.

It is a happy number.

646654644030042 is a `hidden beast` number, since 6 + 4 + 66 + 546 + 4 + 4 + 0 + 30 + 0 + 4 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (646654644030007) and next prime (646654644030077).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4361598 + ... + 36226134.

It is an arithmetic number, because the mean of its divisors is an integer number (30458993228820).

Almost surely, 2^{646654644030042} is an apocalyptic number.

646654644030042 is an abundant number, since it is smaller than the sum of its proper divisors (815377030953318).

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

646654644030042 is a wasteful number, since it uses less digits than its factorization.

646654644030042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31913587 (or 31913584 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 54.

The spelling of 646654644030042 in words is "six hundred forty-six trillion, six hundred fifty-four billion, six hundred forty-four million, thirty thousand, forty-two".