8649138975 has 12 divisors (see below), whose sum is σ = 14299909896. Its totient is φ = 4612874080.

The previous prime is 8649138947. The next prime is 8649138997. The reversal of 8649138975 is 5798319468.

It is not a de Polignac number, because 8649138975 - 2¹⁹ = 8648614687 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57660852 + ... + 57661001.

It is an arithmetic number, because the mean of its divisors is an integer number (1191659158).

Almost surely, 2^8649138975 is an apocalyptic number.

8649138975 is a deficient number, since it is larger than the sum of its proper divisors (5650770921).

8649138975 is a wasteful number, since it uses less digits than its factorization.

8649138975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115321866 (or 115321861 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 60.

The square root of 8649138975 is about 93000.7471744179. The cubic root of 8649138975 is about 2052.6943730807.

The spelling of 8649138975 in words is "eight billion, six hundred forty-nine million, one hundred thirty-eight thousand, nine hundred seventy-five".