26780759550169 has 9 divisors (see below), whose sum is σ = 27186790225077. Its totient is φ = 26380705170204.

The previous prime is 26780759550143. The next prime is 26780759550187. The reversal of 26780759550169 is 96105595708762.

The square root of 26780759550169 is 5175013.

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

It is not a de Polignac number, because 26780759550169 - 2⁵ = 26780759550137 is a prime.

It is a super-2 number, since 2×26780759550169² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26780759550098 and 26780759550107.

It is not an unprimeable number, because it can be changed into a prime (26780759550109) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 346687252 + ... + 346764490.

It is an arithmetic number, because the mean of its divisors is an integer number (3020754469453).

Almost surely, 2^{26780759550169} is an apocalyptic number.

26780759550169 is the 5175013-rd square number.

26780759550169 is the 2587507-th centered octagonal number.

It is an amenable number.

26780759550169 is a deficient number, since it is larger than the sum of its proper divisors (406030674908).

26780759550169 is an frugal number, since it uses more digits than its factorization.

26780759550169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154612 (or 77306 counting only the distinct ones).

The product of its (nonzero) digits is 285768000, while the sum is 70.

The spelling of 26780759550169 in words is "twenty-six trillion, seven hundred eighty billion, seven hundred fifty-nine million, five hundred fifty thousand, one hundred sixty-nine".