8644059961 has 4 divisors (see below), whose sum is σ = 8785765924. Its totient is φ = 8502354000.

The previous prime is 8644059959. The next prime is 8644059967. The reversal of 8644059961 is 1699504468.

It is a happy number.

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 4491546361 + 4152513600 = 67019^2 + 64440^2 .

It is a cyclic number.

It is not a de Polignac number, because 8644059961 - 2¹ = 8644059959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8644059899 and 8644059908.

It is not an unprimeable number, because it can be changed into a prime (8644059967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70852890 + ... + 70853011.

It is an arithmetic number, because the mean of its divisors is an integer number (2196441481).

Almost surely, 2^8644059961 is an apocalyptic number.

It is an amenable number.

8644059961 is a deficient number, since it is larger than the sum of its proper divisors (141705963).

8644059961 is a wasteful number, since it uses less digits than its factorization.

8644059961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141705962.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 8644059961 is about 92973.4368569862. The cubic root of 8644059961 is about 2052.2924947396.

The spelling of 8644059961 in words is "eight billion, six hundred forty-four million, fifty-nine thousand, nine hundred sixty-one".