145715521541 has 2 divisors, whose sum is σ = 145715521542. Its totient is φ = 145715521540.

The previous prime is 145715521531. The next prime is 145715521559. The reversal of 145715521541 is 145125517541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123678119041 + 22037402500 = 351679^2 + 148450^2 .

It is an emirp because it is prime and its reverse (145125517541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145715521541 - 2⁶ = 145715521477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145715521531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72857760770 + 72857760771.

It is an arithmetic number, because the mean of its divisors is an integer number (72857760771).

Almost surely, 2^145715521541 is an apocalyptic number.

It is an amenable number.

145715521541 is a deficient number, since it is larger than the sum of its proper divisors (1).

145715521541 is an equidigital number, since it uses as much as digits as its factorization.

145715521541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 140000, while the sum is 41.

The spelling of 145715521541 in words is "one hundred forty-five billion, seven hundred fifteen million, five hundred twenty-one thousand, five hundred forty-one".