147611945209 has 3 divisors (see below), whose sum is σ = 147612329413. Its totient is φ = 147611561006.

The previous prime is 147611945197. The next prime is 147611945213. The reversal of 147611945209 is 902549116741.

The square root of 147611945209 is 384203.

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: 902549116741 = 347069 ⋅2600489.

It is not a de Polignac number, because 147611945209 - 2⁵ = 147611945177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147611942209) 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, 192102 + ... + 576304.

Almost surely, 2^147611945209 is an apocalyptic number.

147611945209 is the 384203-rd square number.

147611945209 is the 192102-nd centered octagonal number.

It is an amenable number.

147611945209 is a deficient number, since it is larger than the sum of its proper divisors (384204).

147611945209 is an frugal number, since it uses more digits than its factorization.

147611945209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768406 (or 384203 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

Multiplying 147611945209 by its sum of digits (49), we get a square (7232985315241 = 2689421²).

The spelling of 147611945209 in words is "one hundred forty-seven billion, six hundred eleven million, nine hundred forty-five thousand, two hundred nine".