8638529945 has 16 divisors (see below), whose sum is σ = 10564115520. Its totient is φ = 6779505600.

The previous prime is 8638529917. The next prime is 8638530001. The reversal of 8638529945 is 5499258368.

It is not a de Polignac number, because 8638529945 - 2²² = 8634335641 is a prime.

It is a super-2 number, since 2×8638529945² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 78230 + ... + 152960.

It is an arithmetic number, because the mean of its divisors is an integer number (660257220).

Almost surely, 2^8638529945 is an apocalyptic number.

It is an amenable number.

8638529945 is a deficient number, since it is larger than the sum of its proper divisors (1925585575).

8638529945 is a wasteful number, since it uses less digits than its factorization.

8638529945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75176.

The product of its digits is 18662400, while the sum is 59.

The square root of 8638529945 is about 92943.6923357363. The cubic root of 8638529945 is about 2051.8547516939.

The spelling of 8638529945 in words is "eight billion, six hundred thirty-eight million, five hundred twenty-nine thousand, nine hundred forty-five".