26530255687 has 16 divisors (see below), whose sum is σ = 30277154880. Its totient is φ = 23068281600.

The previous prime is 26530255681. The next prime is 26530255721. The reversal of 26530255687 is 78655203562.

It is not a de Polignac number, because 26530255687 - 2³ = 26530255679 is a prime.

It is a super-4 number, since 4×26530255687⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26530255687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26530255681) 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, 842739 + ... + 873652.

It is an arithmetic number, because the mean of its divisors is an integer number (1892322180).

Almost surely, 2^26530255687 is an apocalyptic number.

26530255687 is a deficient number, since it is larger than the sum of its proper divisors (3746899193).

26530255687 is a wasteful number, since it uses less digits than its factorization.

26530255687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716474.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 26530255687 in words is "twenty-six billion, five hundred thirty million, two hundred fifty-five thousand, six hundred eighty-seven".