26625649 has 2 divisors, whose sum is σ = 26625650. Its totient is φ = 26625648.

The previous prime is 26625647. The next prime is 26625659. The reversal of 26625649 is 94652662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26625600 + 49 = 5160^2 + 7^2 .

It is a cyclic number.

It is not a de Polignac number, because 26625649 - 2¹ = 26625647 is a prime.

Together with 26625647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26625647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13312824 + 13312825.

It is an arithmetic number, because the mean of its divisors is an integer number (13312825).

Almost surely, 2^26625649 is an apocalyptic number.

It is an amenable number.

26625649 is a deficient number, since it is larger than the sum of its proper divisors (1).

26625649 is an equidigital number, since it uses as much as digits as its factorization.

26625649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 40.

The square root of 26625649 is about 5160.0047480598. The cubic root of 26625649 is about 298.6070571926.

It can be divided in two parts, 266256 and 49, that multiplied together give a square (13046544 = 3612²).

The spelling of 26625649 in words is "twenty-six million, six hundred twenty-five thousand, six hundred forty-nine".