8121852577 has 4 divisors (see below), whose sum is σ = 8135929156. Its totient is φ = 8107776000.

The previous prime is 8121852551. The next prime is 8121852631. The reversal of 8121852577 is 7752581218.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7172226721 + 949625856 = 84689^2 + 30816^2 .

It is a cyclic number.

It is not a de Polignac number, because 8121852577 - 2¹⁵ = 8121819809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8121852547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7037424 + ... + 7038577.

It is an arithmetic number, because the mean of its divisors is an integer number (2033982289).

Almost surely, 2^8121852577 is an apocalyptic number.

It is an amenable number.

8121852577 is a deficient number, since it is larger than the sum of its proper divisors (14076579).

8121852577 is a wasteful number, since it uses less digits than its factorization.

8121852577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14076578.

The product of its digits is 313600, while the sum is 46.

The square root of 8121852577 is about 90121.3214339426. The cubic root of 8121852577 is about 2010.1032575684.

The spelling of 8121852577 in words is "eight billion, one hundred twenty-one million, eight hundred fifty-two thousand, five hundred seventy-seven".