15535040009 has 4 divisors (see below), whose sum is σ = 15536077716. Its totient is φ = 15534002304.

The previous prime is 15535039999. The next prime is 15535040021. The reversal of 15535040009 is 90004053551.

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 15159765625 + 375274384 = 123125^2 + 19372^2 .

It is a cyclic number.

It is not a de Polignac number, because 15535040009 - 2¹⁶ = 15534974473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15535040069) 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, 496064 + ... + 526449.

It is an arithmetic number, because the mean of its divisors is an integer number (3884019429).

Almost surely, 2^15535040009 is an apocalyptic number.

It is an amenable number.

15535040009 is a deficient number, since it is larger than the sum of its proper divisors (1037707).

15535040009 is a wasteful number, since it uses less digits than its factorization.

15535040009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037706.

The product of its (nonzero) digits is 13500, while the sum is 32.

The spelling of 15535040009 in words is "fifteen billion, five hundred thirty-five million, forty thousand, nine".