509642896440 has 32 divisors (see below), whose sum is σ = 1528928689680. Its totient is φ = 135904772352.

The previous prime is 509642896409. The next prime is 509642896519. The reversal of 509642896440 is 44698246905.

It is a congruent number.

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, 2123511949 + ... + 2123512188.

Almost surely, 2^509642896440 is an apocalyptic number.

It is an amenable number.

509642896440 is an abundant number, since it is smaller than the sum of its proper divisors (1019285793240).

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

509642896440 is a wasteful number, since it uses less digits than its factorization.

509642896440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4247024151 (or 4247024147 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 57.

The spelling of 509642896440 in words is "five hundred nine billion, six hundred forty-two million, eight hundred ninety-six thousand, four hundred forty".