1561144573 has 8 divisors (see below), whose sum is σ = 1629920448. Its totient is φ = 1492443744.

The previous prime is 1561144567. The next prime is 1561144583. The reversal of 1561144573 is 3754411651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1561144573 - 2⁹ = 1561144061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561144583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26065 + ... + 61657.

It is an arithmetic number, because the mean of its divisors is an integer number (203740056).

Almost surely, 2^1561144573 is an apocalyptic number.

It is an amenable number.

1561144573 is a deficient number, since it is larger than the sum of its proper divisors (68775875).

1561144573 is a wasteful number, since it uses less digits than its factorization.

1561144573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37523.

The product of its digits is 50400, while the sum is 37.

The square root of 1561144573 is about 39511.3220862071. The cubic root of 1561144573 is about 1160.0615734755.

The spelling of 1561144573 in words is "one billion, five hundred sixty-one million, one hundred forty-four thousand, five hundred seventy-three".