25313111201647 has 16 divisors (see below), whose sum is σ = 26670150000000. Its totient is φ = 23958552298464.

The previous prime is 25313111201621. The next prime is 25313111201663. The reversal of 25313111201647 is 74610211131352.

It is a cyclic number.

It is not a de Polignac number, because 25313111201647 - 2³¹ = 25310963717999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25313111291647) 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, 414266104 + ... + 414327202.

It is an arithmetic number, because the mean of its divisors is an integer number (1666884375000).

Almost surely, 2^{25313111201647} is an apocalyptic number.

25313111201647 is a deficient number, since it is larger than the sum of its proper divisors (1357038798353).

25313111201647 is a wasteful number, since it uses less digits than its factorization.

25313111201647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81030.

The product of its (nonzero) digits is 30240, while the sum is 37.

Adding to 25313111201647 its reverse (74610211131352), we get a palindrome (99923322332999).

The spelling of 25313111201647 in words is "twenty-five trillion, three hundred thirteen billion, one hundred eleven million, two hundred one thousand, six hundred forty-seven".