248564496779 has 4 divisors (see below), whose sum is σ = 263185937784. Its totient is φ = 233943055776.

The previous prime is 248564496773. The next prime is 248564496781. The reversal of 248564496779 is 977694465842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977694465842 = 2 ⋅488847232921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248564496779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (248564496773) 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 3 ways as a sum of consecutive naturals, for example, 7310720477 + ... + 7310720510.

It is an arithmetic number, because the mean of its divisors is an integer number (65796484446).

Almost surely, 2^248564496779 is an apocalyptic number.

248564496779 is a deficient number, since it is larger than the sum of its proper divisors (14621441005).

248564496779 is a wasteful number, since it uses less digits than its factorization.

248564496779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14621441004.

The product of its digits is 731566080, while the sum is 71.

The spelling of 248564496779 in words is "two hundred forty-eight billion, five hundred sixty-four million, four hundred ninety-six thousand, seven hundred seventy-nine".