25353451140021 has 6 divisors (see below), whose sum is σ = 36621651646710. Its totient is φ = 16902300760008.

The previous prime is 25353451139981. The next prime is 25353451140023. The reversal of 25353451140021 is 12004115435352.

25353451140021 is a `hidden beast` number, since 2 + 5 + 3 + 534 + 5 + 114 + 0 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23173767999396 + 2179683140625 = 4813914^2 + 1476375^2 .

It is not a de Polignac number, because 25353451140021 - 2⁹ = 25353451139509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25353451140023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1408525063326 + ... + 1408525063343.

It is an arithmetic number, because the mean of its divisors is an integer number (6103608607785).

Almost surely, 2^{25353451140021} is an apocalyptic number.

It is an amenable number.

25353451140021 is a deficient number, since it is larger than the sum of its proper divisors (11268200506689).

25353451140021 is a wasteful number, since it uses less digits than its factorization.

25353451140021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817050126675 (or 2817050126672 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 25353451140021 its reverse (12004115435352), we get a palindrome (37357566575373).

The spelling of 25353451140021 in words is "twenty-five trillion, three hundred fifty-three billion, four hundred fifty-one million, one hundred forty thousand, twenty-one".