15580654561 has 4 divisors (see below), whose sum is σ = 15813201712. Its totient is φ = 15348107412.

The previous prime is 15580654543. The next prime is 15580654603. The reversal of 15580654561 is 16545608551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16545608551 = 461 ⋅35890691.

It is a cyclic number.

It is not a de Polignac number, because 15580654561 - 2⁷ = 15580654433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15580654501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116273475 + ... + 116273608.

It is an arithmetic number, because the mean of its divisors is an integer number (3953300428).

Almost surely, 2^15580654561 is an apocalyptic number.

It is an amenable number.

15580654561 is a deficient number, since it is larger than the sum of its proper divisors (232547151).

15580654561 is an equidigital number, since it uses as much as digits as its factorization.

15580654561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232547150.

The product of its (nonzero) digits is 720000, while the sum is 46.

The spelling of 15580654561 in words is "fifteen billion, five hundred eighty million, six hundred fifty-four thousand, five hundred sixty-one".