26729129452705 has 4 divisors (see below), whose sum is σ = 32074955343252. Its totient is φ = 21383303562160.

The previous prime is 26729129452661. The next prime is 26729129452709. The reversal of 26729129452705 is 50725492192762.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5024124999936 + 21705004452769 = 2241456^2 + 4658863^2 .

It is not a de Polignac number, because 26729129452705 - 2³⁷ = 26591690499233 is a prime.

It is a super-2 number, since 2×26729129452705² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26729129452709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2672912945266 + ... + 2672912945275.

It is an arithmetic number, because the mean of its divisors is an integer number (8018738835813).

Almost surely, 2^{26729129452705} is an apocalyptic number.

It is an amenable number.

26729129452705 is a deficient number, since it is larger than the sum of its proper divisors (5345825890547).

26729129452705 is an equidigital number, since it uses as much as digits as its factorization.

26729129452705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5345825890546.

The product of its (nonzero) digits is 38102400, while the sum is 61.

The spelling of 26729129452705 in words is "twenty-six trillion, seven hundred twenty-nine billion, one hundred twenty-nine million, four hundred fifty-two thousand, seven hundred five".