646322160 has 160 divisors (see below), whose sum is σ = 2202930432. Its totient is φ = 155453440.

The previous prime is 646322143. The next prime is 646322189. The reversal of 646322160 is 61223646.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 360787 + ... + 362573.

Almost surely, 2^646322160 is an apocalyptic number.

646322160 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 646322160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1101465216).

646322160 is an abundant number, since it is smaller than the sum of its proper divisors (1556608272).

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

646322160 is a wasteful number, since it uses less digits than its factorization.

646322160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951 (or 1945 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 646322160 is about 25422.8668721684. The cubic root of 646322160 is about 864.6022250300.

It can be divided in two parts, 646 and 322160, that added together give a triangular number (322806 = T₈₀₃).

The spelling of 646322160 in words is "six hundred forty-six million, three hundred twenty-two thousand, one hundred sixty".