646535160 has 192 divisors, whose sum is σ = 2251735200. Its totient is φ = 160309248.

The previous prime is 646535147. The next prime is 646535161. The reversal of 646535160 is 61535646.

646535160 is a `hidden beast` number, since 6 + 465 + 35 + 160 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646535161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 544087 + ... + 545273.

Almost surely, 2^646535160 is an apocalyptic number.

646535160 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 646535160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1125867600).

646535160 is an abundant number, since it is smaller than the sum of its proper divisors (1605200040).

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

646535160 is a wasteful number, since it uses less digits than its factorization.

646535160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310 (or 1303 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 646535160 is about 25427.0556691096. The cubic root of 646535160 is about 864.6971931737.

The spelling of 646535160 in words is "six hundred forty-six million, five hundred thirty-five thousand, one hundred sixty".