25501771543 has 2 divisors, whose sum is σ = 25501771544. Its totient is φ = 25501771542.

The previous prime is 25501771513. The next prime is 25501771649. The reversal of 25501771543 is 34517710552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25501771543 - 2⁵ = 25501771511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25501771496 and 25501771505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25501771513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12750885771 + 12750885772.

It is an arithmetic number, because the mean of its divisors is an integer number (12750885772).

Almost surely, 2^25501771543 is an apocalyptic number.

25501771543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25501771543 is an equidigital number, since it uses as much as digits as its factorization.

25501771543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147000, while the sum is 40.

The spelling of 25501771543 in words is "twenty-five billion, five hundred one million, seven hundred seventy-one thousand, five hundred forty-three".