2591868878 has 8 divisors (see below), whose sum is σ = 3897798840. Its totient is φ = 1292602600.

The previous prime is 2591868859. The next prime is 2591868941. The reversal of 2591868878 is 8788681952.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2591868878.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1664948 + ... + 1666503.

It is an arithmetic number, because the mean of its divisors is an integer number (487224855).

Almost surely, 2^2591868878 is an apocalyptic number.

2591868878 is a deficient number, since it is larger than the sum of its proper divisors (1305929962).

2591868878 is a wasteful number, since it uses less digits than its factorization.

2591868878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331842.

The product of its digits is 15482880, while the sum is 62.

The square root of 2591868878 is about 50910.4004894874. The cubic root of 2591868878 is about 1373.6339275220.

The spelling of 2591868878 in words is "two billion, five hundred ninety-one million, eight hundred sixty-eight thousand, eight hundred seventy-eight".