1645875441200 has 60 divisors (see below), whose sum is σ = 3954373817568. Its totient is φ = 658323859200.

The previous prime is 1645875441179. The next prime is 1645875441241. The reversal of 1645875441200 is 21445785461.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12242345 + ... + 12376055.

Almost surely, 2^{1645875441200} is an apocalyptic number.

1645875441200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1645875441200 is an abundant number, since it is smaller than the sum of its proper divisors (2308498376368).

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

1645875441200 is a wasteful number, since it uses less digits than its factorization.

1645875441200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164502 (or 164491 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 47.

The spelling of 1645875441200 in words is "one trillion, six hundred forty-five billion, eight hundred seventy-five million, four hundred forty-one thousand, two hundred".