15608134081 has 4 divisors (see below), whose sum is σ = 15762670164. Its totient is φ = 15453598000.

The previous prime is 15608134063. The next prime is 15608134093. The reversal of 15608134081 is 18043180651.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8877408400 + 6730725681 = 94220^2 + 82041^2 .

It is a cyclic number.

It is not a de Polignac number, because 15608134081 - 2⁷ = 15608133953 is a prime.

It is a super-2 number, since 2×15608134081² (a number of 21 digits) contains 22 as substring.

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 15608134081.

It is not an unprimeable number, because it can be changed into a prime (15608134001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77267890 + ... + 77268091.

It is an arithmetic number, because the mean of its divisors is an integer number (3940667541).

Almost surely, 2^15608134081 is an apocalyptic number.

It is an amenable number.

15608134081 is a deficient number, since it is larger than the sum of its proper divisors (154536083).

15608134081 is a wasteful number, since it uses less digits than its factorization.

15608134081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154536082.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 15608134081 in words is "fifteen billion, six hundred eight million, one hundred thirty-four thousand, eighty-one".