26345561 has 4 divisors (see below), whose sum is σ = 28740624. Its totient is φ = 23950500.

The previous prime is 26345549. The next prime is 26345569. The reversal of 26345561 is 16554362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26345561 - 2⁶ = 26345497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26345569) 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, 1197515 + ... + 1197536.

It is an arithmetic number, because the mean of its divisors is an integer number (7185156).

Almost surely, 2^26345561 is an apocalyptic number.

It is an amenable number.

26345561 is a deficient number, since it is larger than the sum of its proper divisors (2395063).

26345561 is a wasteful number, since it uses less digits than its factorization.

26345561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395062.

The product of its digits is 21600, while the sum is 32.

The square root of 26345561 is about 5132.7927096270. The cubic root of 26345561 is about 297.5563003398.

The spelling of 26345561 in words is "twenty-six million, three hundred forty-five thousand, five hundred sixty-one".