502020661311 has 144 divisors (see below), whose sum is σ = 857754992640. Its totient is φ = 280911576960.

The previous prime is 502020661277. The next prime is 502020661313. The reversal of 502020661311 is 113166020205.

502020661311 is a `hidden beast` number, since 5 + 0 + 20 + 20 + 6 + 613 + 1 + 1 = 666.

It is not a de Polignac number, because 502020661311 - 2¹³ = 502020653119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (502020661313) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 166285560 + ... + 166288578.

Almost surely, 2^502020661311 is an apocalyptic number.

502020661311 is a deficient number, since it is larger than the sum of its proper divisors (355734331329).

502020661311 is a wasteful number, since it uses less digits than its factorization.

502020661311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234 (or 3212 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 502020661311 its reverse (113166020205), we get a palindrome (615186681516).

The spelling of 502020661311 in words is "five hundred two billion, twenty million, six hundred sixty-one thousand, three hundred eleven".