646532160 has 224 divisors, whose sum is σ = 2129162112. Its totient is φ = 166133760.

The previous prime is 646532153. The next prime is 646532167. The reversal of 646532160 is 61235646.

It is an interprime number because it is at equal distance from previous prime (646532153) and next prime (646532167).

It is not an unprimeable number, because it can be changed into a prime (646532167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4935295 + ... + 4935425.

It is an arithmetic number, because the mean of its divisors is an integer number (9505188).

Almost surely, 2^646532160 is an apocalyptic number.

646532160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646532160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1064581056).

646532160 is an abundant number, since it is smaller than the sum of its proper divisors (1482629952).

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

646532160 is a wasteful number, since it uses less digits than its factorization.

646532160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 646532160 is about 25426.9966767607. The cubic root of 646532160 is about 864.6958557390.

The spelling of 646532160 in words is "six hundred forty-six million, five hundred thirty-two thousand, one hundred sixty".