25555402547 has 2 divisors, whose sum is σ = 25555402548. Its totient is φ = 25555402546.

The previous prime is 25555402519. The next prime is 25555402583. The reversal of 25555402547 is 74520455552.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25555402547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25555402498 and 25555402507.

It is not a weakly prime, because it can be changed into another prime (25555402447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777701273 + 12777701274.

It is an arithmetic number, because the mean of its divisors is an integer number (12777701274).

Almost surely, 2^25555402547 is an apocalyptic number.

25555402547 is a deficient number, since it is larger than the sum of its proper divisors (1).

25555402547 is an equidigital number, since it uses as much as digits as its factorization.

25555402547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400000, while the sum is 44.

The spelling of 25555402547 in words is "twenty-five billion, five hundred fifty-five million, four hundred two thousand, five hundred forty-seven".