509139769552 has 20 divisors (see below), whose sum is σ = 997542107460. Its totient is φ = 251709548288.

The previous prime is 509139769471. The next prime is 509139769573. The reversal of 509139769552 is 255967931905.

It can be written as a sum of positive squares in 2 ways, for example, as 100491536016 + 408648233536 = 317004^2 + 639256^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178769563 + ... + 178772410.

It is an arithmetic number, because the mean of its divisors is an integer number (49877105373).

Almost surely, 2^509139769552 is an apocalyptic number.

It is an amenable number.

509139769552 is a deficient number, since it is larger than the sum of its proper divisors (488402337908).

509139769552 is a wasteful number, since it uses less digits than its factorization.

509139769552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357542070 (or 357542064 counting only the distinct ones).

The product of its (nonzero) digits is 22963500, while the sum is 61.

The spelling of 509139769552 in words is "five hundred nine billion, one hundred thirty-nine million, seven hundred sixty-nine thousand, five hundred fifty-two".