25071379261 has 2 divisors, whose sum is σ = 25071379262. Its totient is φ = 25071379260.

The previous prime is 25071379231. The next prime is 25071379271. The reversal of 25071379261 is 16297317052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24777908100 + 293471161 = 157410^2 + 17131^2 .

It is a cyclic number.

It is not a de Polignac number, because 25071379261 - 2¹⁹ = 25070854973 is a prime.

It is a super-2 number, since 2×25071379261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25071379231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12535689630 + 12535689631.

It is an arithmetic number, because the mean of its divisors is an integer number (12535689631).

Almost surely, 2^25071379261 is an apocalyptic number.

It is an amenable number.

25071379261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25071379261 is an equidigital number, since it uses as much as digits as its factorization.

25071379261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 43.

The spelling of 25071379261 in words is "twenty-five billion, seventy-one million, three hundred seventy-nine thousand, two hundred sixty-one".