26600646469 has 2 divisors, whose sum is σ = 26600646470. Its totient is φ = 26600646468.

The previous prime is 26600646461. The next prime is 26600646473. The reversal of 26600646469 is 96464600662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25579843969 + 1020802500 = 159937^2 + 31950^2 .

It is a cyclic number.

It is not a de Polignac number, because 26600646469 - 2³ = 26600646461 is a prime.

It is a super-2 number, since 2×26600646469² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26600646461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13300323234 + 13300323235.

It is an arithmetic number, because the mean of its divisors is an integer number (13300323235).

Almost surely, 2^26600646469 is an apocalyptic number.

It is an amenable number.

26600646469 is a deficient number, since it is larger than the sum of its proper divisors (1).

26600646469 is an equidigital number, since it uses as much as digits as its factorization.

26600646469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 49.

The spelling of 26600646469 in words is "twenty-six billion, six hundred million, six hundred forty-six thousand, four hundred sixty-nine".