1645201284 has 36 divisors (see below), whose sum is σ = 3876734736. Its totient is φ = 543034128.

The previous prime is 1645201277. The next prime is 1645201357. The reversal of 1645201284 is 4821025461.

It is a happy number.

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, 120847 + ... + 133769.

It is an arithmetic number, because the mean of its divisors is an integer number (107687076).

Almost surely, 2^1645201284 is an apocalyptic number.

It is an amenable number.

1645201284 is an abundant number, since it is smaller than the sum of its proper divisors (2231533452).

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

1645201284 is a wasteful number, since it uses less digits than its factorization.

1645201284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13136 (or 13031 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 1645201284 is about 40561.0809027570. The cubic root of 1645201284 is about 1180.5190869488.

The spelling of 1645201284 in words is "one billion, six hundred forty-five million, two hundred one thousand, two hundred eighty-four".