8638779264 has 32 divisors (see below), whose sum is σ = 22946758440. Its totient is φ = 2879592960.

The previous prime is 8638779241. The next prime is 8638779287. The reversal of 8638779264 is 4629778368.

It is an interprime number because it is at equal distance from previous prime (8638779241) and next prime (8638779287).

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 8638779198 and 8638779207.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 11248027 + ... + 11248794.

Almost surely, 2^8638779264 is an apocalyptic number.

It is an amenable number.

8638779264 is an abundant number, since it is smaller than the sum of its proper divisors (14307979176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8638779264 is a wasteful number, since it uses less digits than its factorization.

8638779264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22496838 (or 22496826 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 60.

The square root of 8638779264 is about 92945.0335628537. The cubic root of 8638779264 is about 2051.8744912197.

The spelling of 8638779264 in words is "eight billion, six hundred thirty-eight million, seven hundred seventy-nine thousand, two hundred sixty-four".