878995491331 has 4 divisors (see below), whose sum is σ = 879225538464. Its totient is φ = 878765444200.

The previous prime is 878995491313. The next prime is 878995491379. The reversal of 878995491331 is 133194599878.

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 878995491331 - 2⁷ = 878995491203 is a prime.

It is a super-2 number, since 2×878995491331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878995491301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115017835 + ... + 115025476.

It is an arithmetic number, because the mean of its divisors is an integer number (219806384616).

Almost surely, 2^878995491331 is an apocalyptic number.

878995491331 is a deficient number, since it is larger than the sum of its proper divisors (230047133).

878995491331 is a wasteful number, since it uses less digits than its factorization.

878995491331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230047132.

The product of its digits is 58786560, while the sum is 67.

The spelling of 878995491331 in words is "eight hundred seventy-eight billion, nine hundred ninety-five million, four hundred ninety-one thousand, three hundred thirty-one".