1645250660 has 48 divisors (see below), whose sum is σ = 3691208640. Its totient is φ = 614148480.

The previous prime is 1645250657. The next prime is 1645250681. The reversal of 1645250660 is 660525461.

It is a self number, because there is not a number n which added to its sum of digits gives 1645250660.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6851 + ... + 57770.

It is an arithmetic number, because the mean of its divisors is an integer number (76900180).

Almost surely, 2^1645250660 is an apocalyptic number.

1645250660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1645250660 is an abundant number, since it is smaller than the sum of its proper divisors (2045957980).

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

1645250660 is a wasteful number, since it uses less digits than its factorization.

1645250660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64716 (or 64714 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1645250660 is about 40561.6895604707. The cubic root of 1645250660 is about 1180.5308967960.

The spelling of 1645250660 in words is "one billion, six hundred forty-five million, two hundred fifty thousand, six hundred sixty".