25440155041321 has 16 divisors (see below), whose sum is σ = 27139157740800. Its totient is φ = 23763765811968.

The previous prime is 25440155041309. The next prime is 25440155041331. The reversal of 25440155041321 is 12314055104452.

It is a cyclic number.

It is not a de Polignac number, because 25440155041321 - 2⁵ = 25440155041289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25440155041331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5615136 + ... + 9077998.

It is an arithmetic number, because the mean of its divisors is an integer number (1696197358800).

Almost surely, 2^{25440155041321} is an apocalyptic number.

It is an amenable number.

25440155041321 is a deficient number, since it is larger than the sum of its proper divisors (1699002699479).

25440155041321 is a wasteful number, since it uses less digits than its factorization.

25440155041321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3466128.

The product of its (nonzero) digits is 96000, while the sum is 37.

The spelling of 25440155041321 in words is "twenty-five trillion, four hundred forty billion, one hundred fifty-five million, forty-one thousand, three hundred twenty-one".