646652160 has 648 divisors, whose sum is σ = 2896560576. Its totient is φ = 134369280.

The previous prime is 646652147. The next prime is 646652173. The reversal of 646652160 is 61256646.

It is a happy number.

646652160 is a `hidden beast` number, since 646 + 6 + 5 + 2 + 1 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (646652147) and next prime (646652173).

It is a tau number, because it is divible by the number of its divisors (648).

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 58786555 + ... + 58786565.

Almost surely, 2^646652160 is an apocalyptic number.

646652160 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 646652160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448280288).

646652160 is an abundant number, since it is smaller than the sum of its proper divisors (2249908416).

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

646652160 is an frugal number, since it uses more digits than its factorization.

646652160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 646652160 is about 25429.3562639718. The cubic root of 646652160 is about 864.7493498986.

The spelling of 646652160 in words is "six hundred forty-six million, six hundred fifty-two thousand, one hundred sixty".