25640305435245 has 32 divisors (see below), whose sum is σ = 41720368435200. Its totient is φ = 13442875758144.

The previous prime is 25640305435183. The next prime is 25640305435271. The reversal of 25640305435245 is 54253450304652.

It is not a de Polignac number, because 25640305435245 - 2¹⁸ = 25640305173101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25640305435194 and 25640305435203.

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, 92452896 + ... + 92729814.

It is an arithmetic number, because the mean of its divisors is an integer number (1303761513600).

Almost surely, 2^{25640305435245} is an apocalyptic number.

It is an amenable number.

25640305435245 is a deficient number, since it is larger than the sum of its proper divisors (16080062999955).

25640305435245 is a wasteful number, since it uses less digits than its factorization.

25640305435245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381609.

The product of its (nonzero) digits is 8640000, while the sum is 48.

Adding to 25640305435245 its reverse (54253450304652), we get a palindrome (79893755739897).

The spelling of 25640305435245 in words is "twenty-five trillion, six hundred forty billion, three hundred five million, four hundred thirty-five thousand, two hundred forty-five".