878765999999 has 4 divisors (see below), whose sum is σ = 930458117664. Its totient is φ = 827073882336.

The previous prime is 878765999983. The next prime is 878766000023. The reversal of 878765999999 is 999999567878.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 878765999999 - 2⁴ = 878765999983 is a prime.

It is a Duffinian number.

878765999999 is a modest number, since divided by 999999 gives 878765 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878765999959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25846058807 + ... + 25846058840.

It is an arithmetic number, because the mean of its divisors is an integer number (232614529416).

Almost surely, 2^878765999999 is an apocalyptic number.

878765999999 is a deficient number, since it is larger than the sum of its proper divisors (51692117665).

878765999999 is a wasteful number, since it uses less digits than its factorization.

878765999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51692117664.

The product of its digits is 49997969280, while the sum is 95.

The spelling of 878765999999 in words is "eight hundred seventy-eight billion, seven hundred sixty-five million, nine hundred ninety-nine thousand, nine hundred ninety-nine".