25045524145541 has 4 divisors (see below), whose sum is σ = 25087759431372. Its totient is φ = 25003288859712.

The previous prime is 25045524145513. The next prime is 25045524145583. The reversal of 25045524145541 is 14554142554052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18915671116225 + 6129853029316 = 4349215^2 + 2475854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25045524145541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25045524195541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21117642026 + ... + 21117643211.

It is an arithmetic number, because the mean of its divisors is an integer number (6271939857843).

Almost surely, 2^{25045524145541} is an apocalyptic number.

It is an amenable number.

25045524145541 is a deficient number, since it is larger than the sum of its proper divisors (42235285831).

25045524145541 is an equidigital number, since it uses as much as digits as its factorization.

25045524145541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42235285830.

The product of its (nonzero) digits is 3200000, while the sum is 47.

Adding to 25045524145541 its reverse (14554142554052), we get a palindrome (39599666699593).

The spelling of 25045524145541 in words is "twenty-five trillion, forty-five billion, five hundred twenty-four million, one hundred forty-five thousand, five hundred forty-one".