25004920643 has 2 divisors, whose sum is σ = 25004920644. Its totient is φ = 25004920642.

The previous prime is 25004920637. The next prime is 25004920693. The reversal of 25004920643 is 34602940052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25004920643 - 2¹⁴ = 25004904259 is a prime.

It is not a weakly prime, because it can be changed into another prime (25004920693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12502460321 + 12502460322.

It is an arithmetic number, because the mean of its divisors is an integer number (12502460322).

Almost surely, 2^25004920643 is an apocalyptic number.

25004920643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25004920643 is an equidigital number, since it uses as much as digits as its factorization.

25004920643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 25004920643 in words is "twenty-five billion, four million, nine hundred twenty thousand, six hundred forty-three".