25378944047 has 2 divisors, whose sum is σ = 25378944048. Its totient is φ = 25378944046.

The previous prime is 25378944001. The next prime is 25378944083. The reversal of 25378944047 is 74044987352.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25378944047 - 2¹² = 25378939951 is a prime.

It is a super-3 number, since 3×25378944047³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25378944047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25378944847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12689472023 + 12689472024.

It is an arithmetic number, because the mean of its divisors is an integer number (12689472024).

Almost surely, 2^25378944047 is an apocalyptic number.

25378944047 is a deficient number, since it is larger than the sum of its proper divisors (1).

25378944047 is an equidigital number, since it uses as much as digits as its factorization.

25378944047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 25378944047 in words is "twenty-five billion, three hundred seventy-eight million, nine hundred forty-four thousand, forty-seven".