25040424421 has 8 divisors (see below), whose sum is σ = 25453799424. Its totient is φ = 24627142320.

The previous prime is 25040424391. The next prime is 25040424427. The reversal of 25040424421 is 12442404052.

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

It is a cyclic number.

It is not a de Polignac number, because 25040424421 - 2¹⁵ = 25040391653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25040424421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25040424427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708840 + ... + 743326.

It is an arithmetic number, because the mean of its divisors is an integer number (3181724928).

Almost surely, 2^25040424421 is an apocalyptic number.

It is an amenable number.

25040424421 is a deficient number, since it is larger than the sum of its proper divisors (413375003).

25040424421 is a wasteful number, since it uses less digits than its factorization.

25040424421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46451.

The product of its (nonzero) digits is 10240, while the sum is 28.

Adding to 25040424421 its reverse (12442404052), we get a palindrome (37482828473).

The spelling of 25040424421 in words is "twenty-five billion, forty million, four hundred twenty-four thousand, four hundred twenty-one".