25240433534 has 4 divisors (see below), whose sum is σ = 37860650304. Its totient is φ = 12620216766.

The previous prime is 25240433531. The next prime is 25240433551. The reversal of 25240433534 is 43533404252.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25240433494 and 25240433503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25240433531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310108382 + ... + 6310108385.

It is an arithmetic number, because the mean of its divisors is an integer number (9465162576).

Almost surely, 2^25240433534 is an apocalyptic number.

25240433534 is a deficient number, since it is larger than the sum of its proper divisors (12620216770).

25240433534 is a wasteful number, since it uses less digits than its factorization.

25240433534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12620216769.

The product of its (nonzero) digits is 172800, while the sum is 35.

Adding to 25240433534 its reverse (43533404252), we get a palindrome (68773837786).

The spelling of 25240433534 in words is "twenty-five billion, two hundred forty million, four hundred thirty-three thousand, five hundred thirty-four".