645486960 has 160 divisors (see below), whose sum is σ = 2088437760. Its totient is φ = 164736000.

The previous prime is 645486953. The next prime is 645486967. The reversal of 645486960 is 69684546.

It is a happy number.

645486960 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (645486953) and next prime (645486967).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645486967) 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, 751011 + ... + 751869.

It is an arithmetic number, because the mean of its divisors is an integer number (13052736).

Almost surely, 2^645486960 is an apocalyptic number.

645486960 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 645486960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1044218880).

645486960 is an abundant number, since it is smaller than the sum of its proper divisors (1442950800).

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

645486960 is a wasteful number, since it uses less digits than its factorization.

645486960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The square root of 645486960 is about 25406.4354052276. The cubic root of 645486960 is about 864.2296414619.

The spelling of 645486960 in words is "six hundred forty-five million, four hundred eighty-six thousand, nine hundred sixty".