879121121978 has 12 divisors (see below), whose sum is σ = 1449460032090. Its totient is φ = 399600509880.

The previous prime is 879121121953. The next prime is 879121121999.

879121121978 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 879106886449 + 14235529 = 937607^2 + 3773^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1816365713 + ... + 1816366196.

Almost surely, 2^879121121978 is an apocalyptic number.

879121121978 is a deficient number, since it is larger than the sum of its proper divisors (570338910112).

879121121978 is a wasteful number, since it uses less digits than its factorization.

879121121978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3632731933 (or 3632731922 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 56.

The spelling of 879121121978 in words is "eight hundred seventy-nine billion, one hundred twenty-one million, one hundred twenty-one thousand, nine hundred seventy-eight".