25074621017 has 2 divisors, whose sum is σ = 25074621018. Its totient is φ = 25074621016.

The previous prime is 25074620993. The next prime is 25074621029. The reversal of 25074621017 is 71012647052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19438215241 + 5636405776 = 139421^2 + 75076^2 .

It is a cyclic number.

It is not a de Polignac number, because 25074621017 - 2¹⁶ = 25074555481 is a prime.

It is a super-3 number, since 3×25074621017³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (25074621037) 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, 12537310508 + 12537310509.

It is an arithmetic number, because the mean of its divisors is an integer number (12537310509).

Almost surely, 2^25074621017 is an apocalyptic number.

It is an amenable number.

25074621017 is a deficient number, since it is larger than the sum of its proper divisors (1).

25074621017 is an equidigital number, since it uses as much as digits as its factorization.

25074621017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 25074621017 in words is "twenty-five billion, seventy-four million, six hundred twenty-one thousand, seventeen".