8502557121 has 24 divisors (see below), whose sum is σ = 12743771040. Its totient is φ = 5665064832.

The previous prime is 8502557093. The next prime is 8502557143. The reversal of 8502557121 is 1217552058.

8502557121 is a `hidden beast` number, since 85 + 0 + 2 + 5 + 571 + 2 + 1 = 666.

It is not a de Polignac number, because 8502557121 - 2¹⁴ = 8502540737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8502557321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 449766 + ... + 468288.

It is an arithmetic number, because the mean of its divisors is an integer number (530990460).

Almost surely, 2^8502557121 is an apocalyptic number.

8502557121 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8502557121 is a deficient number, since it is larger than the sum of its proper divisors (4241213919).

8502557121 is a wasteful number, since it uses less digits than its factorization.

8502557121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20427 (or 20415 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 36.

The square root of 8502557121 is about 92209.3114658167. The cubic root of 8502557121 is about 2041.0321831059.

The spelling of 8502557121 in words is "eight billion, five hundred two million, five hundred fifty-seven thousand, one hundred twenty-one".