26561506773 has 8 divisors (see below), whose sum is σ = 35439823168. Its totient is φ = 17695430784.

The previous prime is 26561506771. The next prime is 26561506781. The reversal of 26561506773 is 37760516562.

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

It is not a de Polignac number, because 26561506773 - 2¹ = 26561506771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26561506771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3055036 + ... + 3063717.

It is an arithmetic number, because the mean of its divisors is an integer number (4429977896).

Almost surely, 2^26561506773 is an apocalyptic number.

It is an amenable number.

26561506773 is a deficient number, since it is larger than the sum of its proper divisors (8878316395).

26561506773 is a wasteful number, since it uses less digits than its factorization.

26561506773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6120203.

The product of its (nonzero) digits is 1587600, while the sum is 48.

The spelling of 26561506773 in words is "twenty-six billion, five hundred sixty-one million, five hundred six thousand, seven hundred seventy-three".