645626160 has 160 divisors (see below), whose sum is σ = 2232000000. Its totient is φ = 171535104.

The previous prime is 645626143. The next prime is 645626161. The reversal of 645626160 is 61626546.

It is a happy number.

645626160 is a `hidden beast` number, since 645 + 6 + 2 + 6 + 1 + 6 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (645626161) 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, 1077541 + ... + 1078139.

It is an arithmetic number, because the mean of its divisors is an integer number (13950000).

Almost surely, 2^645626160 is an apocalyptic number.

645626160 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 645626160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1116000000).

645626160 is an abundant number, since it is smaller than the sum of its proper divisors (1586373840).

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

645626160 is a wasteful number, since it uses less digits than its factorization.

645626160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120 (or 1108 counting only the distinct ones).

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

The square root of 645626160 is about 25409.1747209546. The cubic root of 645626160 is about 864.2917610331.

The spelling of 645626160 in words is "six hundred forty-five million, six hundred twenty-six thousand, one hundred sixty".