25592916649 has 2 divisors, whose sum is σ = 25592916650. Its totient is φ = 25592916648.

The previous prime is 25592916637. The next prime is 25592916653. The reversal of 25592916649 is 94661929552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24261177600 + 1331739049 = 155760^2 + 36493^2 .

It is a cyclic number.

It is not a de Polignac number, because 25592916649 - 2⁵ = 25592916617 is a prime.

It is a super-2 number, since 2×25592916649² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25592916593 and 25592916602.

It is not a weakly prime, because it can be changed into another prime (25592916689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12796458324 + 12796458325.

It is an arithmetic number, because the mean of its divisors is an integer number (12796458325).

Almost surely, 2^25592916649 is an apocalyptic number.

It is an amenable number.

25592916649 is a deficient number, since it is larger than the sum of its proper divisors (1).

25592916649 is an equidigital number, since it uses as much as digits as its factorization.

25592916649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10497600, while the sum is 58.

The spelling of 25592916649 in words is "twenty-five billion, five hundred ninety-two million, nine hundred sixteen thousand, six hundred forty-nine".