8940108649 has 4 divisors (see below), whose sum is σ = 8940777300. Its totient is φ = 8939440000.

The previous prime is 8940108647. The next prime is 8940108659. The reversal of 8940108649 is 9468010498.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1153281600 + 7786827049 = 33960^2 + 88243^2 .

It is a cyclic number.

It is not a de Polignac number, because 8940108649 - 2¹ = 8940108647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8940108641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313852 + ... + 341149.

It is an arithmetic number, because the mean of its divisors is an integer number (2235194325).

Almost surely, 2^8940108649 is an apocalyptic number.

It is an amenable number.

8940108649 is a deficient number, since it is larger than the sum of its proper divisors (668651).

8940108649 is a wasteful number, since it uses less digits than its factorization.

8940108649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668650.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 8940108649 is about 94552.1477757116. The cubic root of 8940108649 is about 2075.4595120326.

The spelling of 8940108649 in words is "eight billion, nine hundred forty million, one hundred eight thousand, six hundred forty-nine".