646061132016 has 60 divisors (see below), whose sum is σ = 1814508402720. Its totient is φ = 214587313920.

The previous prime is 646061132009. The next prime is 646061132023. The reversal of 646061132016 is 610231160646.

It is a happy number.

646061132016 is a `hidden beast` number, since 6 + 4 + 6 + 0 + 611 + 3 + 20 + 16 = 666.

It is an interprime number because it is at equal distance from previous prime (646061132009) and next prime (646061132023).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7942696 + ... + 8023623.

It is an arithmetic number, because the mean of its divisors is an integer number (30241806712).

Almost surely, 2^646061132016 is an apocalyptic number.

It is an amenable number.

646061132016 is an abundant number, since it is smaller than the sum of its proper divisors (1168447270704).

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

646061132016 is a wasteful number, since it uses less digits than its factorization.

646061132016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15966614 (or 15966605 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 646061132016 in words is "six hundred forty-six billion, sixty-one million, one hundred thirty-two thousand, sixteen".