820505052525 has 12 divisors (see below), whose sum is σ = 1356568353632. Its totient is φ = 437602694640.

The previous prime is 820505052503. The next prime is 820505052539. The reversal of 820505052525 is 525250505028.

It is not a de Polignac number, because 820505052525 - 2⁷ = 820505052397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5470033609 + ... + 5470033758.

Almost surely, 2^820505052525 is an apocalyptic number.

It is an amenable number.

820505052525 is a deficient number, since it is larger than the sum of its proper divisors (536063301107).

820505052525 is a wasteful number, since it uses less digits than its factorization.

820505052525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10940067380 (or 10940067375 counting only the distinct ones).

The product of its (nonzero) digits is 200000, while the sum is 39.

The spelling of 820505052525 in words is "eight hundred twenty billion, five hundred five million, fifty-two thousand, five hundred twenty-five".