145501522513 has 4 divisors (see below), whose sum is σ = 154060435620. Its totient is φ = 136942609408.

The previous prime is 145501522447. The next prime is 145501522541. The reversal of 145501522513 is 315225105541.

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 111136890384 + 34364632129 = 333372^2 + 185377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145501522513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145501522583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4279456528 + ... + 4279456561.

It is an arithmetic number, because the mean of its divisors is an integer number (38515108905).

Almost surely, 2^145501522513 is an apocalyptic number.

It is an amenable number.

145501522513 is a deficient number, since it is larger than the sum of its proper divisors (8558913107).

145501522513 is an equidigital number, since it uses as much as digits as its factorization.

145501522513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8558913106.

The product of its (nonzero) digits is 30000, while the sum is 34.

The spelling of 145501522513 in words is "one hundred forty-five billion, five hundred one million, five hundred twenty-two thousand, five hundred thirteen".