47187517505 has 4 divisors (see below), whose sum is σ = 56625021012. Its totient is φ = 37750014000.

The previous prime is 47187517493. The next prime is 47187517513. The reversal of 47187517505 is 50571578174.

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 30865921969 + 16321595536 = 175687^2 + 127756^2 .

It is not a de Polignac number, because 47187517505 - 2²⁴ = 47170740289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4718751746 + ... + 4718751755.

It is an arithmetic number, because the mean of its divisors is an integer number (14156255253).

Almost surely, 2^47187517505 is an apocalyptic number.

It is an amenable number.

47187517505 is a deficient number, since it is larger than the sum of its proper divisors (9437503507).

47187517505 is an equidigital number, since it uses as much as digits as its factorization.

47187517505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9437503506.

The product of its (nonzero) digits is 1372000, while the sum is 50.

The spelling of 47187517505 in words is "forty-seven billion, one hundred eighty-seven million, five hundred seventeen thousand, five hundred five".