8642512551 has 4 divisors (see below), whose sum is σ = 11523350072. Its totient is φ = 5761675032.

The previous prime is 8642512481. The next prime is 8642512553. The reversal of 8642512551 is 1552152468.

8642512551 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 8642512551 - 2²⁵ = 8608958119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8642512553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440418756 + ... + 1440418761.

It is an arithmetic number, because the mean of its divisors is an integer number (2880837518).

Almost surely, 2^8642512551 is an apocalyptic number.

8642512551 is a deficient number, since it is larger than the sum of its proper divisors (2880837521).

8642512551 is a wasteful number, since it uses less digits than its factorization.

8642512551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2880837520.

The product of its digits is 96000, while the sum is 39.

The square root of 8642512551 is about 92965.1146990095. The cubic root of 8642512551 is about 2052.1700242237.

The spelling of 8642512551 in words is "eight billion, six hundred forty-two million, five hundred twelve thousand, five hundred fifty-one".