25630774726321 has 8 divisors (see below), whose sum is σ = 26787940882920. Its totient is φ = 24491831659008.

The previous prime is 25630774726309. The next prime is 25630774726327. The reversal of 25630774726321 is 12362747703652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28186716321 + 25602588010000 = 167889^2 + 5059900^2 .

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 25630774726321 - 2²³ = 25630766337713 is a prime.

It is a super-2 number, since 2×25630774726321² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25630774726327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4555769446 + ... + 4555775071.

It is an arithmetic number, because the mean of its divisors is an integer number (3348492610365).

Almost surely, 2^{25630774726321} is an apocalyptic number.

It is an amenable number.

25630774726321 is a deficient number, since it is larger than the sum of its proper divisors (1157166156599).

25630774726321 is an equidigital number, since it uses as much as digits as its factorization.

25630774726321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111544643.

The product of its (nonzero) digits is 17781120, while the sum is 55.

The spelling of 25630774726321 in words is "twenty-five trillion, six hundred thirty billion, seven hundred seventy-four million, seven hundred twenty-six thousand, three hundred twenty-one".