25378927669 has 2 divisors, whose sum is σ = 25378927670. Its totient is φ = 25378927668.

The previous prime is 25378927667. The next prime is 25378927687. The reversal of 25378927669 is 96672987352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22168232100 + 3210695569 = 148890^2 + 56663^2 .

It is a cyclic number.

It is not a de Polignac number, because 25378927669 - 2¹ = 25378927667 is a prime.

It is a super-3 number, since 3×25378927669³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 25378927667, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25378927669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25378927667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12689463834 + 12689463835.

It is an arithmetic number, because the mean of its divisors is an integer number (12689463835).

Almost surely, 2^25378927669 is an apocalyptic number.

It is an amenable number.

25378927669 is a deficient number, since it is larger than the sum of its proper divisors (1).

25378927669 is an equidigital number, since it uses as much as digits as its factorization.

25378927669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 64.

The spelling of 25378927669 in words is "twenty-five billion, three hundred seventy-eight million, nine hundred twenty-seven thousand, six hundred sixty-nine".