13578025541 has 2 divisors, whose sum is σ = 13578025542. Its totient is φ = 13578025540.

The previous prime is 13578025519. The next prime is 13578025583. The reversal of 13578025541 is 14552087531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9935903041 + 3642122500 = 99679^2 + 60350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13578025541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13578025501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6789012770 + 6789012771.

It is an arithmetic number, because the mean of its divisors is an integer number (6789012771).

Almost surely, 2^13578025541 is an apocalyptic number.

It is an amenable number.

13578025541 is a deficient number, since it is larger than the sum of its proper divisors (1).

13578025541 is an equidigital number, since it uses as much as digits as its factorization.

13578025541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168000, while the sum is 41.

The spelling of 13578025541 in words is "thirteen billion, five hundred seventy-eight million, twenty-five thousand, five hundred forty-one".