1561424063 has 4 divisors (see below), whose sum is σ = 1567645128. Its totient is φ = 1555203000.

The previous prime is 1561423993. The next prime is 1561424077. The reversal of 1561424063 is 3604241651.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1561424063 - 2⁸ = 1561423807 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 (1561424563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3110156 + ... + 3110657.

It is an arithmetic number, because the mean of its divisors is an integer number (391911282).

Almost surely, 2^1561424063 is an apocalyptic number.

1561424063 is a deficient number, since it is larger than the sum of its proper divisors (6221065).

1561424063 is an equidigital number, since it uses as much as digits as its factorization.

1561424063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6221064.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1561424063 is about 39514.8587622428. The cubic root of 1561424063 is about 1160.1307975282.

The spelling of 1561424063 in words is "one billion, five hundred sixty-one million, four hundred twenty-four thousand, sixty-three".