25279340543 has 2 divisors, whose sum is σ = 25279340544. Its totient is φ = 25279340542.

The previous prime is 25279340539. The next prime is 25279340557. The reversal of 25279340543 is 34504397252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25279340543 - 2² = 25279340539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25279340494 and 25279340503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25279345543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12639670271 + 12639670272.

It is an arithmetic number, because the mean of its divisors is an integer number (12639670272).

Almost surely, 2^25279340543 is an apocalyptic number.

25279340543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25279340543 is an equidigital number, since it uses as much as digits as its factorization.

25279340543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 25279340543 in words is "twenty-five billion, two hundred seventy-nine million, three hundred forty thousand, five hundred forty-three".