646411132160 has 72 divisors (see below), whose sum is σ = 1601748366120. Its totient is φ = 249648422912.

The previous prime is 646411132139. The next prime is 646411132163. The reversal of 646411132160 is 61231114646.

It can be written as a sum of positive squares in 4 ways, for example, as 143877593344 + 502533538816 = 379312^2 + 708896^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 646411132160.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646411132163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8669927 + ... + 8744166.

It is an arithmetic number, because the mean of its divisors is an integer number (22246505085).

Almost surely, 2^646411132160 is an apocalyptic number.

It is an amenable number.

646411132160 is an abundant number, since it is smaller than the sum of its proper divisors (955337233960).

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

646411132160 is a wasteful number, since it uses less digits than its factorization.

646411132160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17414143 (or 17414129 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 646411132160 in words is "six hundred forty-six billion, four hundred eleven million, one hundred thirty-two thousand, one hundred sixty".