509220646794 has 12 divisors (see below), whose sum is σ = 1103311401426. Its totient is φ = 169740215592.

The previous prime is 509220646751. The next prime is 509220646819. The reversal of 509220646794 is 497646022905.

509220646794 is a `hidden beast` number, since 5 + 0 + 92 + 2 + 0 + 6 + 467 + 94 = 666.

It can be written as a sum of positive squares in only one way, i.e., 273377351025 + 235843295769 = 522855^2 + 485637^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 509220646794.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14145017949 + ... + 14145017984.

Almost surely, 2^509220646794 is an apocalyptic number.

509220646794 is an abundant number, since it is smaller than the sum of its proper divisors (594090754632).

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

509220646794 is a wasteful number, since it uses less digits than its factorization.

509220646794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28290035941 (or 28290035938 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 509220646794 in words is "five hundred nine billion, two hundred twenty million, six hundred forty-six thousand, seven hundred ninety-four".