26312638369 has 8 divisors (see below), whose sum is σ = 27862683048. Its totient is φ = 24762842880.

The previous prime is 26312638349. The next prime is 26312638381. The reversal of 26312638369 is 96383621362.

It can be written as a sum of positive squares in 4 ways, for example, as 13615855969 + 12696782400 = 116687^2 + 112680^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 26312638369 - 2²⁵ = 26279083937 is a prime.

It is a super-2 number, since 2×26312638369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26312638349) 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, 182659 + ... + 293239.

It is an arithmetic number, because the mean of its divisors is an integer number (3482835381).

Almost surely, 2^26312638369 is an apocalyptic number.

It is an amenable number.

26312638369 is a deficient number, since it is larger than the sum of its proper divisors (1550044679).

26312638369 is a wasteful number, since it uses less digits than its factorization.

26312638369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124595.

The product of its digits is 1679616, while the sum is 49.

The spelling of 26312638369 in words is "twenty-six billion, three hundred twelve million, six hundred thirty-eight thousand, three hundred sixty-nine".