25454639047 has 2 divisors, whose sum is σ = 25454639048. Its totient is φ = 25454639046.

The previous prime is 25454638999. The next prime is 25454639071. The reversal of 25454639047 is 74093645452.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25454639047 is a prime.

It is a super-3 number, since 3×25454639047³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25454639447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12727319523 + 12727319524.

It is an arithmetic number, because the mean of its divisors is an integer number (12727319524).

Almost surely, 2^25454639047 is an apocalyptic number.

25454639047 is a deficient number, since it is larger than the sum of its proper divisors (1).

25454639047 is an equidigital number, since it uses as much as digits as its factorization.

25454639047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 25454639047 in words is "twenty-five billion, four hundred fifty-four million, six hundred thirty-nine thousand, forty-seven".