878315261 has 8 divisors (see below), whose sum is σ = 938342880. Its totient is φ = 819667728.

The previous prime is 878315209. The next prime is 878315267. The reversal of 878315261 is 162513878.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878315261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878315267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343706 + ... + 346251.

It is an arithmetic number, because the mean of its divisors is an integer number (117292860).

Almost surely, 2^878315261 is an apocalyptic number.

It is an amenable number.

878315261 is a deficient number, since it is larger than the sum of its proper divisors (60027619).

878315261 is a wasteful number, since it uses less digits than its factorization.

878315261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690043.

The product of its digits is 80640, while the sum is 41.

The square root of 878315261 is about 29636.3840743097. The cubic root of 878315261 is about 957.6720434741.

The spelling of 878315261 in words is "eight hundred seventy-eight million, three hundred fifteen thousand, two hundred sixty-one".