4145055653521 has 2 divisors, whose sum is σ = 4145055653522. Its totient is φ = 4145055653520.

The previous prime is 4145055653471. The next prime is 4145055653527. The reversal of 4145055653521 is 1253565505414.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3677419875600 + 467635777921 = 1917660^2 + 683839^2 .

It is a cyclic number.

It is not a de Polignac number, because 4145055653521 - 2⁹ = 4145055653009 is a prime.

It is not a weakly prime, because it can be changed into another prime (4145055653527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2072527826760 + 2072527826761.

It is an arithmetic number, because the mean of its divisors is an integer number (2072527826761).

Almost surely, 2^{4145055653521} is an apocalyptic number.

It is an amenable number.

4145055653521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4145055653521 is an equidigital number, since it uses as much as digits as its factorization.

4145055653521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800000, while the sum is 46.

The spelling of 4145055653521 in words is "four trillion, one hundred forty-five billion, fifty-five million, six hundred fifty-three thousand, five hundred twenty-one".