878643983951 has 4 divisors (see below), whose sum is σ = 906987338304. Its totient is φ = 850300629600.

The previous prime is 878643983923. The next prime is 878643983953. The reversal of 878643983951 is 159389346878.

878643983951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 878643983951 - 2⁶ = 878643983887 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 (878643983953) 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, 14171677130 + ... + 14171677191.

It is an arithmetic number, because the mean of its divisors is an integer number (226746834576).

Almost surely, 2^878643983951 is an apocalyptic number.

878643983951 is a deficient number, since it is larger than the sum of its proper divisors (28343354353).

878643983951 is a wasteful number, since it uses less digits than its factorization.

878643983951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28343354352.

The product of its digits is 313528320, while the sum is 71.

The spelling of 878643983951 in words is "eight hundred seventy-eight billion, six hundred forty-three million, nine hundred eighty-three thousand, nine hundred fifty-one".