25606105501 has 2 divisors, whose sum is σ = 25606105502. Its totient is φ = 25606105500.

The previous prime is 25606105453. The next prime is 25606105513. The reversal of 25606105501 is 10550160652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16571412900 + 9034692601 = 128730^2 + 95051^2 .

It is a cyclic number.

It is not a de Polignac number, because 25606105501 - 2³¹ = 23458621853 is a prime.

It is a super-2 number, since 2×25606105501² (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 (25606105541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12803052750 + 12803052751.

It is an arithmetic number, because the mean of its divisors is an integer number (12803052751).

Almost surely, 2^25606105501 is an apocalyptic number.

It is an amenable number.

25606105501 is a deficient number, since it is larger than the sum of its proper divisors (1).

25606105501 is an equidigital number, since it uses as much as digits as its factorization.

25606105501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 25606105501 in words is "twenty-five billion, six hundred six million, one hundred five thousand, five hundred one".