26658287638879 has 16 divisors (see below), whose sum is σ = 28790874016128. Its totient is φ = 24537425594112.

The previous prime is 26658287638837. The next prime is 26658287638889. The reversal of 26658287638879 is 97883678285662.

It is a cyclic number.

It is not a de Polignac number, because 26658287638879 - 2⁷ = 26658287638751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26658287638796 and 26658287638805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26658287638889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36937509 + ... + 37652305.

It is an arithmetic number, because the mean of its divisors is an integer number (1799429626008).

Almost surely, 2^{26658287638879} is an apocalyptic number.

26658287638879 is a deficient number, since it is larger than the sum of its proper divisors (2132586377249).

26658287638879 is a wasteful number, since it uses less digits than its factorization.

26658287638879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722994.

The product of its digits is 23410114560, while the sum is 85.

The spelling of 26658287638879 in words is "twenty-six trillion, six hundred fifty-eight billion, two hundred eighty-seven million, six hundred thirty-eight thousand, eight hundred seventy-nine".