305566040020 has 12 divisors (see below), whose sum is σ = 641688684084. Its totient is φ = 122226416000.

The previous prime is 305566039979. The next prime is 305566040027. The reversal of 305566040020 is 20040665503.

It can be written as a sum of positive squares in 2 ways, for example, as 149419356304 + 156146683716 = 386548^2 + 395154^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305566040027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7639150981 + ... + 7639151020.

It is an arithmetic number, because the mean of its divisors is an integer number (53474057007).

Almost surely, 2^305566040020 is an apocalyptic number.

It is an amenable number.

305566040020 is an abundant number, since it is smaller than the sum of its proper divisors (336122644064).

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

305566040020 is a wasteful number, since it uses less digits than its factorization.

305566040020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15278302010 (or 15278302008 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 305566040020 in words is "three hundred five billion, five hundred sixty-six million, forty thousand, twenty".