878078615213 has 4 divisors (see below), whose sum is σ = 890107089468. Its totient is φ = 866050140960.

The previous prime is 878078615209. The next prime is 878078615237. The reversal of 878078615213 is 312516870878.

878078615213 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 can be written as a sum of positive squares in 2 ways, for example, as 379773922564 + 498304692649 = 616258^2 + 705907^2 .

It is a cyclic number.

It is not a de Polignac number, because 878078615213 - 2² = 878078615209 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 (878078915213) 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, 6014237018 + ... + 6014237163.

It is an arithmetic number, because the mean of its divisors is an integer number (222526772367).

Almost surely, 2^878078615213 is an apocalyptic number.

It is an amenable number.

878078615213 is a deficient number, since it is larger than the sum of its proper divisors (12028474255).

878078615213 is a wasteful number, since it uses less digits than its factorization.

878078615213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12028474254.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The spelling of 878078615213 in words is "eight hundred seventy-eight billion, seventy-eight million, six hundred fifteen thousand, two hundred thirteen".