25451450501 has 2 divisors, whose sum is σ = 25451450502. Its totient is φ = 25451450500.

The previous prime is 25451450489. The next prime is 25451450527. The reversal of 25451450501 is 10505415452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24712154401 + 739296100 = 157201^2 + 27190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25451450501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25451650501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12725725250 + 12725725251.

It is an arithmetic number, because the mean of its divisors is an integer number (12725725251).

Almost surely, 2^25451450501 is an apocalyptic number.

It is an amenable number.

25451450501 is a deficient number, since it is larger than the sum of its proper divisors (1).

25451450501 is an equidigital number, since it uses as much as digits as its factorization.

25451450501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20000, while the sum is 32.

Adding to 25451450501 its reverse (10505415452), we get a palindrome (35956865953).

The spelling of 25451450501 in words is "twenty-five billion, four hundred fifty-one million, four hundred fifty thousand, five hundred one".