26158338478 has 4 divisors (see below), whose sum is σ = 39237507720. Its totient is φ = 13079169238.

The previous prime is 26158338431. The next prime is 26158338487. The reversal of 26158338478 is 87483385162.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6539584618 + ... + 6539584621.

It is an arithmetic number, because the mean of its divisors is an integer number (9809376930).

Almost surely, 2^26158338478 is an apocalyptic number.

26158338478 is a deficient number, since it is larger than the sum of its proper divisors (13079169242).

26158338478 is a wasteful number, since it uses less digits than its factorization.

26158338478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13079169241.

The product of its digits is 7741440, while the sum is 55.

The spelling of 26158338478 in words is "twenty-six billion, one hundred fifty-eight million, three hundred thirty-eight thousand, four hundred seventy-eight".