645356160 has 320 divisors, whose sum is σ = 2354853600. Its totient is φ = 168376320.

The previous prime is 645356141. The next prime is 645356207. The reversal of 645356160 is 61653546.

645356160 is a `hidden beast` number, since 6 + 4 + 5 + 35 + 616 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

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 39 ways as a sum of consecutive naturals, for example, 3058455 + ... + 3058665.

Almost surely, 2^645356160 is an apocalyptic number.

645356160 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 645356160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1177426800).

645356160 is an abundant number, since it is smaller than the sum of its proper divisors (1709497440).

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

645356160 is a wasteful number, since it uses less digits than its factorization.

645356160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 280 counting only the distinct ones).

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

The square root of 645356160 is about 25403.8611238528. The cubic root of 645356160 is about 864.1712623464.

The spelling of 645356160 in words is "six hundred forty-five million, three hundred fifty-six thousand, one hundred sixty".