8609142538 has 4 divisors (see below), whose sum is σ = 12913713810. Its totient is φ = 4304571268.

The previous prime is 8609142511. The next prime is 8609142541. The reversal of 8609142538 is 8352419068.

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

It can be written as a sum of positive squares in only one way, i.e., 7561519849 + 1047622689 = 86957^2 + 32367^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2152285633 + ... + 2152285636.

Almost surely, 2^8609142538 is an apocalyptic number.

8609142538 is a deficient number, since it is larger than the sum of its proper divisors (4304571272).

8609142538 is a wasteful number, since it uses less digits than its factorization.

8609142538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4304571271.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 8609142538 is about 92785.4651225072. The cubic root of 8609142538 is about 2049.5253739994.

The spelling of 8609142538 in words is "eight billion, six hundred nine million, one hundred forty-two thousand, five hundred thirty-eight".