25665434043 has 8 divisors (see below), whose sum is σ = 35400598800. Its totient is φ = 16520279328.

The previous prime is 25665434017. The next prime is 25665434071. The reversal of 25665434043 is 34043456652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25665434043 - 2⁹ = 25665433531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25665433986 and 25665434004.

It is not an unprimeable number, because it can be changed into a prime (25665434083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147502408 + ... + 147502581.

It is an arithmetic number, because the mean of its divisors is an integer number (4425074850).

Almost surely, 2^25665434043 is an apocalyptic number.

25665434043 is a deficient number, since it is larger than the sum of its proper divisors (9735164757).

25665434043 is a wasteful number, since it uses less digits than its factorization.

25665434043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295005021.

The product of its (nonzero) digits is 1036800, while the sum is 42.

The spelling of 25665434043 in words is "twenty-five billion, six hundred sixty-five million, four hundred thirty-four thousand, forty-three".