25651281937 has 2 divisors, whose sum is σ = 25651281938. Its totient is φ = 25651281936.

The previous prime is 25651281919. The next prime is 25651281973. The reversal of 25651281937 is 73918215652.

Together with next prime (25651281973) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25579524096 + 71757841 = 159936^2 + 8471^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25651281937 is a prime.

It is a super-2 number, since 2×25651281937² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25651281907) 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, 12825640968 + 12825640969.

It is an arithmetic number, because the mean of its divisors is an integer number (12825640969).

Almost surely, 2^25651281937 is an apocalyptic number.

It is an amenable number.

25651281937 is a deficient number, since it is larger than the sum of its proper divisors (1).

25651281937 is an equidigital number, since it uses as much as digits as its factorization.

25651281937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 49.

The spelling of 25651281937 in words is "twenty-five billion, six hundred fifty-one million, two hundred eighty-one thousand, nine hundred thirty-seven".