148447613521 has 3 divisors (see below), whose sum is σ = 148447998811. Its totient is φ = 148447228232.

The previous prime is 148447613519. The next prime is 148447613527. The reversal of 148447613521 is 125316744841.

The square root of 148447613521 is 385289.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 125316744841 = 132491 ⋅945851.

It can be written as a sum of positive squares in only one way, i.e., 125343613521 + 23104000000 = 354039^2 + 152000^2 .

It is not a de Polignac number, because 148447613521 - 2¹ = 148447613519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148447613527) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 192645 + ... + 577933.

Almost surely, 2^148447613521 is an apocalyptic number.

148447613521 is the 385289-th square number.

148447613521 is the 192645-th centered octagonal number.

It is an amenable number.

148447613521 is a deficient number, since it is larger than the sum of its proper divisors (385290).

148447613521 is an frugal number, since it uses more digits than its factorization.

148447613521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770578 (or 385289 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The spelling of 148447613521 in words is "one hundred forty-eight billion, four hundred forty-seven million, six hundred thirteen thousand, five hundred twenty-one".