978742247879 has 8 divisors (see below), whose sum is σ = 1070329380240. Its totient is φ = 887590209600.

The previous prime is 978742247827. The next prime is 978742247969.

978742247879 is nontrivially palindromic in base 10.

978742247879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-978742247879 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 (978742247809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108768812 + ... + 108777809.

It is an arithmetic number, because the mean of its divisors is an integer number (133791172530).

Almost surely, 2^978742247879 is an apocalyptic number.

978742247879 is a deficient number, since it is larger than the sum of its proper divisors (91587132361).

978742247879 is a wasteful number, since it uses less digits than its factorization.

978742247879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217547041.

The product of its digits is 796594176, while the sum is 74.

The spelling of 978742247879 in words is "nine hundred seventy-eight billion, seven hundred forty-two million, two hundred forty-seven thousand, eight hundred seventy-nine".