978849948879 has 36 divisors (see below), whose sum is σ = 1587181665888. Its totient is φ = 580620184320.

The previous prime is 978849948863. The next prime is 978849948887.

978849948879 is a `hidden beast` number, since 9 + 7 + 8 + 8 + 499 + 48 + 8 + 79 = 666.

978849948879 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 978849948879 - 2⁴ = 978849948863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978849948809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9511074 + ... + 9613439.

It is an arithmetic number, because the mean of its divisors is an integer number (44088379608).

Almost surely, 2^978849948879 is an apocalyptic number.

978849948879 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

978849948879 is a deficient number, since it is larger than the sum of its proper divisors (608331717009).

978849948879 is a wasteful number, since it uses less digits than its factorization.

978849948879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19124588 (or 19124574 counting only the distinct ones).

The product of its digits is 21069103104, while the sum is 90.

The spelling of 978849948879 in words is "nine hundred seventy-eight billion, eight hundred forty-nine million, nine hundred forty-eight thousand, eight hundred seventy-nine".