25621442441 has 8 divisors (see below), whose sum is σ = 31004098560. Its totient is φ = 20669398848.

The previous prime is 25621442423. The next prime is 25621442447. The reversal of 25621442441 is 14424412652.

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 25621442441 - 2¹⁴ = 25621426057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25621442447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107653001 + ... + 107653238.

It is an arithmetic number, because the mean of its divisors is an integer number (3875512320).

Almost surely, 2^25621442441 is an apocalyptic number.

It is an amenable number.

25621442441 is a deficient number, since it is larger than the sum of its proper divisors (5382656119).

25621442441 is a wasteful number, since it uses less digits than its factorization.

25621442441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215306263.

The product of its digits is 61440, while the sum is 35.

The spelling of 25621442441 in words is "twenty-five billion, six hundred twenty-one million, four hundred forty-two thousand, four hundred forty-one".