26464561 has 2 divisors, whose sum is σ = 26464562. Its totient is φ = 26464560.

The previous prime is 26464547. The next prime is 26464567. The reversal of 26464561 is 16546462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25401600 + 1062961 = 5040^2 + 1031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26464561 is a prime.

It is not a weakly prime, because it can be changed into another prime (26464567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13232280 + 13232281.

It is an arithmetic number, because the mean of its divisors is an integer number (13232281).

Almost surely, 2^26464561 is an apocalyptic number.

It is an amenable number.

26464561 is a deficient number, since it is larger than the sum of its proper divisors (1).

26464561 is an equidigital number, since it uses as much as digits as its factorization.

26464561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 34.

The square root of 26464561 is about 5144.3717789444. The cubic root of 26464561 is about 298.0036371792.

The spelling of 26464561 in words is "twenty-six million, four hundred sixty-four thousand, five hundred sixty-one".