25035666989 has 2 divisors, whose sum is σ = 25035666990. Its totient is φ = 25035666988.

The previous prime is 25035666973. The next prime is 25035667009. The reversal of 25035666989 is 98966653052.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21340242889 + 3695424100 = 146083^2 + 60790^2 .

It is a cyclic number.

It is not a de Polignac number, because 25035666989 - 2⁴ = 25035666973 is a prime.

It is a super-2 number, since 2×25035666989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25035666889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12517833494 + 12517833495.

It is an arithmetic number, because the mean of its divisors is an integer number (12517833495).

Almost surely, 2^25035666989 is an apocalyptic number.

It is an amenable number.

25035666989 is a deficient number, since it is larger than the sum of its proper divisors (1).

25035666989 is an equidigital number, since it uses as much as digits as its factorization.

25035666989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20995200, while the sum is 59.

The spelling of 25035666989 in words is "twenty-five billion, thirty-five million, six hundred sixty-six thousand, nine hundred eighty-nine".