26090971729 has 3 divisors (see below), whose sum is σ = 26091133257. Its totient is φ = 26090810202.

The previous prime is 26090971727. The next prime is 26090971747. The reversal of 26090971729 is 92717909062.

It is a happy number.

The square root of 26090971729 is 161527.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 26090971729 - 2¹ = 26090971727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26090971727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 80764 + ... + 242290.

It is an arithmetic number, because the mean of its divisors is an integer number (8697044419).

Almost surely, 2^26090971729 is an apocalyptic number.

26090971729 is the 161527-th square number.

26090971729 is the 80764-th centered octagonal number.

It is an amenable number.

26090971729 is a deficient number, since it is larger than the sum of its proper divisors (161528).

26090971729 is an frugal number, since it uses more digits than its factorization.

26090971729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323054 (or 161527 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 52.

The spelling of 26090971729 in words is "twenty-six billion, ninety million, nine hundred seventy-one thousand, seven hundred twenty-nine".