501542745640 has 32 divisors (see below), whose sum is σ = 1128812095080. Its totient is φ = 200556490752.

The previous prime is 501542745629. The next prime is 501542745721. The reversal of 501542745640 is 46547245105.

It can be written as a sum of positive squares in 4 ways, for example, as 498359754916 + 3182990724 = 705946^2 + 56418^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1759809 + ... + 2024848.

Almost surely, 2^501542745640 is an apocalyptic number.

It is an amenable number.

501542745640 is an abundant number, since it is smaller than the sum of its proper divisors (627269349440).

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

501542745640 is a wasteful number, since it uses less digits than its factorization.

501542745640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3787981 (or 3787977 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 43.

The spelling of 501542745640 in words is "five hundred one billion, five hundred forty-two million, seven hundred forty-five thousand, six hundred forty".