64784788979 has 8 divisors (see below), whose sum is σ = 65077483968. Its totient is φ = 64492369000.

The previous prime is 64784788933. The next prime is 64784789033. The reversal of 64784788979 is 97988748746.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64784788979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64784788879) 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, 410984 + ... + 546330.

It is an arithmetic number, because the mean of its divisors is an integer number (8134685496).

Almost surely, 2^64784788979 is an apocalyptic number.

64784788979 is a deficient number, since it is larger than the sum of its proper divisors (292694989).

64784788979 is a wasteful number, since it uses less digits than its factorization.

64784788979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137505.

The product of its digits is 1365590016, while the sum is 77.

The spelling of 64784788979 in words is "sixty-four billion, seven hundred eighty-four million, seven hundred eighty-eight thousand, nine hundred seventy-nine".