25651478942881 has 8 divisors (see below), whose sum is σ = 29456243762400. Its totient is φ = 22092182821440.

The previous prime is 25651478942851. The next prime is 25651478942897. The reversal of 25651478942881 is 18824987415652.

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 25651478942881 - 2²⁵ = 25651445388449 is a prime.

It is a super-2 number, since 2×25651478942881² (a number of 28 digits) contains 22 as substring.

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 25651478942881.

It is not an unprimeable number, because it can be changed into a prime (25651478942851) 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, 61367174296 + ... + 61367174713.

It is an arithmetic number, because the mean of its divisors is an integer number (3682030470300).

Almost surely, 2^{25651478942881} is an apocalyptic number.

It is an amenable number.

25651478942881 is a deficient number, since it is larger than the sum of its proper divisors (3804764819519).

25651478942881 is a wasteful number, since it uses less digits than its factorization.

25651478942881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122734349039.

The product of its digits is 309657600, while the sum is 70.

The spelling of 25651478942881 in words is "twenty-five trillion, six hundred fifty-one billion, four hundred seventy-eight million, nine hundred forty-two thousand, eight hundred eighty-one".