102644440979 has 8 divisors (see below), whose sum is σ = 103674410112. Its totient is φ = 101619558720.

The previous prime is 102644440939. The next prime is 102644440999. The reversal of 102644440979 is 979044446201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102644440979 - 2³² = 98349473683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102644440919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1231154 + ... + 1311879.

It is an arithmetic number, because the mean of its divisors is an integer number (12959301264).

Almost surely, 2^102644440979 is an apocalyptic number.

102644440979 is a deficient number, since it is larger than the sum of its proper divisors (1029969133).

102644440979 is a wasteful number, since it uses less digits than its factorization.

102644440979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543437.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 102644440979 in words is "one hundred two billion, six hundred forty-four million, four hundred forty thousand, nine hundred seventy-nine".