1533128945 has 4 divisors (see below), whose sum is σ = 1839754740. Its totient is φ = 1226503152.

The previous prime is 1533128911. The next prime is 1533128951. The reversal of 1533128945 is 5498213351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5498213351 = 31 ⋅177361721.

It can be written as a sum of positive squares in 2 ways, for example, as 781985296 + 751143649 = 27964^2 + 27407^2 .

It is a cyclic number.

It is not a de Polignac number, because 1533128945 - 2⁶ = 1533128881 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153312890 + ... + 153312899.

It is an arithmetic number, because the mean of its divisors is an integer number (459938685).

Almost surely, 2^1533128945 is an apocalyptic number.

It is an amenable number.

1533128945 is a deficient number, since it is larger than the sum of its proper divisors (306625795).

1533128945 is an equidigital number, since it uses as much as digits as its factorization.

1533128945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306625794.

The product of its digits is 129600, while the sum is 41.

The square root of 1533128945 is about 39155.1905243736. The cubic root of 1533128945 is about 1153.0803228309.

The spelling of 1533128945 in words is "one billion, five hundred thirty-three million, one hundred twenty-eight thousand, nine hundred forty-five".