25390134547 has 2 divisors, whose sum is σ = 25390134548. Its totient is φ = 25390134546.

The previous prime is 25390134529. The next prime is 25390134613. The reversal of 25390134547 is 74543109352.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25390134547 is a prime.

It is not a weakly prime, because it can be changed into another prime (25390138547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12695067273 + 12695067274.

It is an arithmetic number, because the mean of its divisors is an integer number (12695067274).

Almost surely, 2^25390134547 is an apocalyptic number.

25390134547 is a deficient number, since it is larger than the sum of its proper divisors (1).

25390134547 is an equidigital number, since it uses as much as digits as its factorization.

25390134547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 25390134547 in words is "twenty-five billion, three hundred ninety million, one hundred thirty-four thousand, five hundred forty-seven".