25313111201645 has 32 divisors (see below), whose sum is σ = 32273389703520. Its totient is φ = 19023203082240.

The previous prime is 25313111201621. The next prime is 25313111201663. The reversal of 25313111201645 is 54610211131352.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 2919744543076 + 22393366658569 = 1708726^2 + 4732163^2 .

It is not a de Polignac number, because 25313111201645 - 2¹⁴ = 25313111185261 is a prime.

It is a super-3 number, since 3×25313111201645³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 342212465 + ... + 342286425.

It is an arithmetic number, because the mean of its divisors is an integer number (1008543428235).

Almost surely, 2^{25313111201645} is an apocalyptic number.

It is an amenable number.

25313111201645 is a deficient number, since it is larger than the sum of its proper divisors (6960278501875).

25313111201645 is a wasteful number, since it uses less digits than its factorization.

25313111201645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137825.

The product of its (nonzero) digits is 21600, while the sum is 35.

Adding to 25313111201645 its reverse (54610211131352), we get a palindrome (79923322332997).

The spelling of 25313111201645 in words is "twenty-five trillion, three hundred thirteen billion, one hundred eleven million, two hundred one thousand, six hundred forty-five".