646541642046 has 8 divisors (see below), whose sum is σ = 1293083284104. Its totient is φ = 215513880680.

The previous prime is 646541642029. The next prime is 646541642053. The reversal of 646541642046 is 640246145646.

It is a sphenic number, since it is the product of 3 distinct primes.

646541642046 is an admirable number.

It is a super-2 number, since 2×646541642046² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 646541641986 and 646541642004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53878470165 + ... + 53878470176.

It is an arithmetic number, because the mean of its divisors is an integer number (161635410513).

Almost surely, 2^646541642046 is an apocalyptic number.

646541642046 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

646541642046 is a wasteful number, since it uses less digits than its factorization.

646541642046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107756940346.

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 646541642046 in words is "six hundred forty-six billion, five hundred forty-one million, six hundred forty-two thousand, forty-six".