25042205137 has 2 divisors, whose sum is σ = 25042205138. Its totient is φ = 25042205136.

The previous prime is 25042205129. The next prime is 25042205171. The reversal of 25042205137 is 73150224052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24247472656 + 794732481 = 155716^2 + 28191^2 .

It is a cyclic number.

It is not a de Polignac number, because 25042205137 - 2³ = 25042205129 is a prime.

It is a super-2 number, since 2×25042205137² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25042205099 and 25042205108.

It is not a weakly prime, because it can be changed into another prime (25042205117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12521102568 + 12521102569.

It is an arithmetic number, because the mean of its divisors is an integer number (12521102569).

Almost surely, 2^25042205137 is an apocalyptic number.

It is an amenable number.

25042205137 is a deficient number, since it is larger than the sum of its proper divisors (1).

25042205137 is an equidigital number, since it uses as much as digits as its factorization.

25042205137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 31.

Adding to 25042205137 its reverse (73150224052), we get a palindrome (98192429189).

The spelling of 25042205137 in words is "twenty-five billion, forty-two million, two hundred five thousand, one hundred thirty-seven".