25719663841 has 8 divisors (see below), whose sum is σ = 25830036360. Its totient is φ = 25609371648.

The previous prime is 25719663839. The next prime is 25719663859. The reversal of 25719663841 is 14836691752.

It can be written as a sum of positive squares in 4 ways, for example, as 3839041600 + 21880622241 = 61960^2 + 147921^2 .

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 25719663841 - 2¹ = 25719663839 is a prime.

It is a super-2 number, since 2×25719663841² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25719663041) 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, 672465 + ... + 709681.

It is an arithmetic number, because the mean of its divisors is an integer number (3228754545).

Almost surely, 2^25719663841 is an apocalyptic number.

It is an amenable number.

25719663841 is a deficient number, since it is larger than the sum of its proper divisors (110372519).

25719663841 is a wasteful number, since it uses less digits than its factorization.

25719663841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40163.

The product of its digits is 2177280, while the sum is 52.

The spelling of 25719663841 in words is "twenty-five billion, seven hundred nineteen million, six hundred sixty-three thousand, eight hundred forty-one".