304545221640 has 96 divisors (see below), whose sum is σ = 1079751254400. Its totient is φ = 73829143680.

The previous prime is 304545221573. The next prime is 304545221683. The reversal of 304545221640 is 46122545403.

304545221640 is a `hidden beast` number, since 3 + 0 + 4 + 5 + 4 + 5 + 2 + 2 + 1 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 304545221595 and 304545221604.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38448720 + ... + 38456639.

It is an arithmetic number, because the mean of its divisors is an integer number (11247408900).

Almost surely, 2^304545221640 is an apocalyptic number.

304545221640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

304545221640 is an abundant number, since it is smaller than the sum of its proper divisors (775206032760).

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

304545221640 is a wasteful number, since it uses less digits than its factorization.

304545221640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76905387 (or 76905380 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 304545221640 in words is "three hundred four billion, five hundred forty-five million, two hundred twenty-one thousand, six hundred forty".