25237369081 has 2 divisors, whose sum is σ = 25237369082. Its totient is φ = 25237369080.

The previous prime is 25237369043. The next prime is 25237369093. The reversal of 25237369081 is 18096373252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24982647481 + 254721600 = 158059^2 + 15960^2 .

It is a cyclic number.

It is not a de Polignac number, because 25237369081 - 2¹¹ = 25237367033 is a prime.

It is a super-2 number, since 2×25237369081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25237366081) 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, 12618684540 + 12618684541.

It is an arithmetic number, because the mean of its divisors is an integer number (12618684541).

Almost surely, 2^25237369081 is an apocalyptic number.

It is an amenable number.

25237369081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25237369081 is an equidigital number, since it uses as much as digits as its factorization.

25237369081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 25237369081 in words is "twenty-five billion, two hundred thirty-seven million, three hundred sixty-nine thousand, eighty-one".