978557303755879 has 12 divisors (see below), whose sum is σ = 1003401106203168. Its totient is φ = 954314629458560.

The previous prime is 978557303755873. The next prime is 978557303755921.

978557303755879 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-978557303755879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 978557303755879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978557303755873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110182174 + ... + 118731739.

It is an arithmetic number, because the mean of its divisors is an integer number (83616758850264).

Almost surely, 2^{978557303755879} is an apocalyptic number.

978557303755879 is a deficient number, since it is larger than the sum of its proper divisors (24843802447289).

978557303755879 is a wasteful number, since it uses less digits than its factorization.

978557303755879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228916538 (or 228916497 counting only the distinct ones).

The product of its (nonzero) digits is 70013160000, while the sum is 88.

The spelling of 978557303755879 in words is "nine hundred seventy-eight trillion, five hundred fifty-seven billion, three hundred three million, seven hundred fifty-five thousand, eight hundred seventy-nine".