8644919477 has 4 divisors (see below), whose sum is σ = 8845964160. Its totient is φ = 8443874796.

The previous prime is 8644919473. The next prime is 8644919489. The reversal of 8644919477 is 7749194468.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8644919477 - 2² = 8644919473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8644919473) 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, 100522277 + ... + 100522362.

It is an arithmetic number, because the mean of its divisors is an integer number (2211491040).

Almost surely, 2^8644919477 is an apocalyptic number.

It is an amenable number.

8644919477 is a deficient number, since it is larger than the sum of its proper divisors (201044683).

8644919477 is a wasteful number, since it uses less digits than its factorization.

8644919477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201044682.

The product of its digits is 12192768, while the sum is 59.

The square root of 8644919477 is about 92978.0591161162. The cubic root of 8644919477 is about 2052.3605152369.

The spelling of 8644919477 in words is "eight billion, six hundred forty-four million, nine hundred nineteen thousand, four hundred seventy-seven".