15564142047117 has 4 divisors (see below), whose sum is σ = 20752189396160. Its totient is φ = 10376094698076.

The previous prime is 15564142047061. The next prime is 15564142047137. The reversal of 15564142047117 is 71174024146551.

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.

It is not a de Polignac number, because 15564142047117 - 2¹⁵ = 15564142014349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15564142047137) 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, 2594023674517 + ... + 2594023674522.

It is an arithmetic number, because the mean of its divisors is an integer number (5188047349040).

Almost surely, 2^{15564142047117} is an apocalyptic number.

It is an amenable number.

15564142047117 is a deficient number, since it is larger than the sum of its proper divisors (5188047349043).

15564142047117 is an equidigital number, since it uses as much as digits as its factorization.

15564142047117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5188047349042.

The product of its (nonzero) digits is 940800, while the sum is 48.

The spelling of 15564142047117 in words is "fifteen trillion, five hundred sixty-four billion, one hundred forty-two million, forty-seven thousand, one hundred seventeen".