26145661 has 2 divisors, whose sum is σ = 26145662. Its totient is φ = 26145660.

The previous prime is 26145599. The next prime is 26145667. The reversal of 26145661 is 16654162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15452761 + 10692900 = 3931^2 + 3270^2 .

It is a cyclic number.

It is not a de Polignac number, because 26145661 - 2¹³ = 26137469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26145667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13072830 + 13072831.

It is an arithmetic number, because the mean of its divisors is an integer number (13072831).

Almost surely, 2^26145661 is an apocalyptic number.

It is an amenable number.

26145661 is a deficient number, since it is larger than the sum of its proper divisors (1).

26145661 is an equidigital number, since it uses as much as digits as its factorization.

26145661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 26145661 is about 5113.2828007064. The cubic root of 26145661 is about 296.8018078624.

The spelling of 26145661 in words is "twenty-six million, one hundred forty-five thousand, six hundred sixty-one".