25438277149 has 2 divisors, whose sum is σ = 25438277150. Its totient is φ = 25438277148.

The previous prime is 25438277107. The next prime is 25438277177. The reversal of 25438277149 is 94177283452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25438017049 + 260100 = 159493^2 + 510^2 .

It is a cyclic number.

It is not a de Polignac number, because 25438277149 - 2¹¹ = 25438275101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25438277096 and 25438277105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25438277849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12719138574 + 12719138575.

It is an arithmetic number, because the mean of its divisors is an integer number (12719138575).

Almost surely, 2^25438277149 is an apocalyptic number.

It is an amenable number.

25438277149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25438277149 is an equidigital number, since it uses as much as digits as its factorization.

25438277149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 52.

The spelling of 25438277149 in words is "twenty-five billion, four hundred thirty-eight million, two hundred seventy-seven thousand, one hundred forty-nine".