25621516415145 has 96 divisors (see below), whose sum is σ = 50200640179200. Its totient is φ = 11095487754624.

The previous prime is 25621516415137. The next prime is 25621516415149. The reversal of 25621516415145 is 54151461512652.

It is not a de Polignac number, because 25621516415145 - 2³ = 25621516415137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25621516415094 and 25621516415103.

It is not an unprimeable number, because it can be changed into a prime (25621516415149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 240689422 + ... + 240795848.

It is an arithmetic number, because the mean of its divisors is an integer number (522923335200).

Almost surely, 2^{25621516415145} is an apocalyptic number.

It is an amenable number.

25621516415145 is a deficient number, since it is larger than the sum of its proper divisors (24579123764055).

25621516415145 is a wasteful number, since it uses less digits than its factorization.

25621516415145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123707 (or 123700 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 48.

Adding to 25621516415145 its reverse (54151461512652), we get a palindrome (79772977927797).

The spelling of 25621516415145 in words is "twenty-five trillion, six hundred twenty-one billion, five hundred sixteen million, four hundred fifteen thousand, one hundred forty-five".