15609552189 has 16 divisors (see below), whose sum is σ = 25948346880. Its totient is φ = 8108858160.

The previous prime is 15609552187. The next prime is 15609552227. The reversal of 15609552189 is 98125590651.

It is not a de Polignac number, because 15609552189 - 2¹ = 15609552187 is a prime.

It is a super-2 number, since 2×15609552189² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15609552181) 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, 33786679 + ... + 33787140.

It is an arithmetic number, because the mean of its divisors is an integer number (1621771680).

Almost surely, 2^15609552189 is an apocalyptic number.

It is an amenable number.

15609552189 is a deficient number, since it is larger than the sum of its proper divisors (10338794691).

15609552189 is a wasteful number, since it uses less digits than its factorization.

15609552189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67573840.

The product of its (nonzero) digits is 972000, while the sum is 51.

The spelling of 15609552189 in words is "fifteen billion, six hundred nine million, five hundred fifty-two thousand, one hundred eighty-nine".