15561134513 has 8 divisors (see below), whose sum is σ = 15795524160. Its totient is φ = 15326807760.

The previous prime is 15561134509. The next prime is 15561134549. The reversal of 15561134513 is 31543116551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15561134513 - 2² = 15561134509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15561130513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791543 + ... + 810963.

It is an arithmetic number, because the mean of its divisors is an integer number (1974440520).

Almost surely, 2^15561134513 is an apocalyptic number.

It is an amenable number.

15561134513 is a deficient number, since it is larger than the sum of its proper divisors (234389647).

15561134513 is a wasteful number, since it uses less digits than its factorization.

15561134513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31447.

The product of its digits is 27000, while the sum is 35.

The spelling of 15561134513 in words is "fifteen billion, five hundred sixty-one million, one hundred thirty-four thousand, five hundred thirteen".