25131663556547 has 2 divisors, whose sum is σ = 25131663556548. Its totient is φ = 25131663556546.

The previous prime is 25131663556541. The next prime is 25131663556561. The reversal of 25131663556547 is 74565536613152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25131663556547 - 2¹⁸ = 25131663294403 is a prime.

It is not a weakly prime, because it can be changed into another prime (25131663556541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12565831778273 + 12565831778274.

It is an arithmetic number, because the mean of its divisors is an integer number (12565831778274).

Almost surely, 2^{25131663556547} is an apocalyptic number.

25131663556547 is a deficient number, since it is larger than the sum of its proper divisors (1).

25131663556547 is an equidigital number, since it uses as much as digits as its factorization.

25131663556547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040000, while the sum is 59.

The spelling of 25131663556547 in words is "twenty-five trillion, one hundred thirty-one billion, six hundred sixty-three million, five hundred fifty-six thousand, five hundred forty-seven".