25640325505641 has 16 divisors (see below), whose sum is σ = 42622878763008. Its totient is φ = 13319649613200.

The previous prime is 25640325505609. The next prime is 25640325505679. The reversal of 25640325505641 is 14650552304652.

It is not a de Polignac number, because 25640325505641 - 2⁵ = 25640325505609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25640325505141) 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, 55498539825 + ... + 55498540286.

It is an arithmetic number, because the mean of its divisors is an integer number (2663929922688).

Almost surely, 2^{25640325505641} is an apocalyptic number.

25640325505641 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25640325505641 is a deficient number, since it is larger than the sum of its proper divisors (16982553257367).

25640325505641 is a wasteful number, since it uses less digits than its factorization.

25640325505641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110997080132.

The product of its (nonzero) digits is 4320000, while the sum is 48.

The spelling of 25640325505641 in words is "twenty-five trillion, six hundred forty billion, three hundred twenty-five million, five hundred five thousand, six hundred forty-one".