25971610531 has 2 divisors, whose sum is σ = 25971610532. Its totient is φ = 25971610530.

The previous prime is 25971610529. The next prime is 25971610589. The reversal of 25971610531 is 13501617952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25971610531 - 2¹ = 25971610529 is a prime.

It is a super-2 number, since 2×25971610531² (a number of 22 digits) contains 22 as substring.

Together with 25971610529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25971610031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12985805265 + 12985805266.

It is an arithmetic number, because the mean of its divisors is an integer number (12985805266).

Almost surely, 2^25971610531 is an apocalyptic number.

25971610531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25971610531 is an equidigital number, since it uses as much as digits as its factorization.

25971610531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 25971610531 in words is "twenty-five billion, nine hundred seventy-one million, six hundred ten thousand, five hundred thirty-one".