1561328527 has 16 divisors (see below), whose sum is σ = 1778775552. Its totient is φ = 1356567520.

The previous prime is 1561328519. The next prime is 1561328551. The reversal of 1561328527 is 7258231651.

It is not a de Polignac number, because 1561328527 - 2³ = 1561328519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1561328527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561328597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526533 + ... + 529489.

It is an arithmetic number, because the mean of its divisors is an integer number (111173472).

Almost surely, 2^1561328527 is an apocalyptic number.

1561328527 is a deficient number, since it is larger than the sum of its proper divisors (217447025).

1561328527 is a wasteful number, since it uses less digits than its factorization.

1561328527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5078.

The product of its digits is 100800, while the sum is 40.

The square root of 1561328527 is about 39513.6498820344. The cubic root of 1561328527 is about 1160.1071361115.

The spelling of 1561328527 in words is "one billion, five hundred sixty-one million, three hundred twenty-eight thousand, five hundred twenty-seven".