646670597132 has 96 divisors (see below), whose sum is σ = 1349922309120. Its totient is φ = 265196655360.

The previous prime is 646670597123. The next prime is 646670597143. The reversal of 646670597132 is 231795076646.

It is a super-2 number, since 2×646670597132² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90731753 + ... + 90738879.

It is an arithmetic number, because the mean of its divisors is an integer number (14061690720).

Almost surely, 2^646670597132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646670597132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674961154560).

646670597132 is an abundant number, since it is smaller than the sum of its proper divisors (703251711988).

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

646670597132 is a wasteful number, since it uses less digits than its factorization.

646670597132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8151 (or 8149 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 56.

The spelling of 646670597132 in words is "six hundred forty-six billion, six hundred seventy million, five hundred ninety-seven thousand, one hundred thirty-two".