8138566992 has 40 divisors (see below), whose sum is σ = 21277950624. Its totient is φ = 2680169344.

The previous prime is 8138566981. The next prime is 8138566999. The reversal of 8138566992 is 2996658318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8138566999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017423 + ... + 1025390.

Almost surely, 2^8138566992 is an apocalyptic number.

It is an amenable number.

8138566992 is an abundant number, since it is smaller than the sum of its proper divisors (13139383632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8138566992 is a wasteful number, since it uses less digits than its factorization.

8138566992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042907 (or 2042901 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 57.

The square root of 8138566992 is about 90214.0066286827. The cubic root of 8138566992 is about 2011.4812140755.

The spelling of 8138566992 in words is "eight billion, one hundred thirty-eight million, five hundred sixty-six thousand, nine hundred ninety-two".