8640549043 has 32 divisors (see below), whose sum is σ = 10675906560. Its totient is φ = 6835570560.

The previous prime is 8640549023. The next prime is 8640549053. The reversal of 8640549043 is 3409450468.

It is a happy number.

It is not a de Polignac number, because 8640549043 - 2¹³ = 8640540851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8640549023) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 399733 + ... + 420793.

It is an arithmetic number, because the mean of its divisors is an integer number (333622080).

Almost surely, 2^8640549043 is an apocalyptic number.

8640549043 is a deficient number, since it is larger than the sum of its proper divisors (2035357517).

8640549043 is a wasteful number, since it uses less digits than its factorization.

8640549043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21187.

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 8640549043 is about 92954.5536431648. The cubic root of 8640549043 is about 2052.0146003841.

The spelling of 8640549043 in words is "eight billion, six hundred forty million, five hundred forty-nine thousand, forty-three".