509406125720 has 16 divisors (see below), whose sum is σ = 1146163782960. Its totient is φ = 203762450272.

The previous prime is 509406125719. The next prime is 509406125731. The reversal of 509406125720 is 27521604905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6367576532 + ... + 6367576611.

It is an arithmetic number, because the mean of its divisors is an integer number (71635236435).

Almost surely, 2^509406125720 is an apocalyptic number.

It is an amenable number.

509406125720 is an abundant number, since it is smaller than the sum of its proper divisors (636757657240).

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

509406125720 is a wasteful number, since it uses less digits than its factorization.

509406125720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12735153154 (or 12735153150 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 509406125720 in words is "five hundred nine billion, four hundred six million, one hundred twenty-five thousand, seven hundred twenty".