47505672987 has 4 divisors (see below), whose sum is σ = 63340897320. Its totient is φ = 31670448656.

The previous prime is 47505672979. The next prime is 47505673003. The reversal of 47505672987 is 78927650574.

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

It is a cyclic number.

It is not a de Polignac number, because 47505672987 - 2³ = 47505672979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47505672987.

It is not an unprimeable number, because it can be changed into a prime (47505672917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7917612162 + ... + 7917612167.

It is an arithmetic number, because the mean of its divisors is an integer number (15835224330).

Almost surely, 2^47505672987 is an apocalyptic number.

47505672987 is a deficient number, since it is larger than the sum of its proper divisors (15835224333).

47505672987 is a wasteful number, since it uses less digits than its factorization.

47505672987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15835224332.

The product of its (nonzero) digits is 29635200, while the sum is 60.

The spelling of 47505672987 in words is "forty-seven billion, five hundred five million, six hundred seventy-two thousand, nine hundred eighty-seven".