645524461560 has 64 divisors (see below), whose sum is σ = 2112625514880. Its totient is φ = 156490778240.

The previous prime is 645524461531. The next prime is 645524461573. The reversal of 645524461560 is 65164425546.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244515522 + ... + 244518161.

It is an arithmetic number, because the mean of its divisors is an integer number (33009773670).

Almost surely, 2^645524461560 is an apocalyptic number.

645524461560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

645524461560 is an abundant number, since it is smaller than the sum of its proper divisors (1467101053320).

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

645524461560 is a wasteful number, since it uses less digits than its factorization.

645524461560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489033708 (or 489033704 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 48.

The spelling of 645524461560 in words is "six hundred forty-five billion, five hundred twenty-four million, four hundred sixty-one thousand, five hundred sixty".