87517850474 has 4 divisors (see below), whose sum is σ = 131276775714. Its totient is φ = 43758925236.

The previous prime is 87517850449. The next prime is 87517850543. The reversal of 87517850474 is 47405871578.

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

It can be written as a sum of positive squares in only one way, i.e., 75923944849 + 11593905625 = 275543^2 + 107675^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21879462617 + ... + 21879462620.

Almost surely, 2^87517850474 is an apocalyptic number.

87517850474 is a deficient number, since it is larger than the sum of its proper divisors (43758925240).

87517850474 is a wasteful number, since it uses less digits than its factorization.

87517850474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43758925239.

The product of its (nonzero) digits is 8780800, while the sum is 56.

The spelling of 87517850474 in words is "eighty-seven billion, five hundred seventeen million, eight hundred fifty thousand, four hundred seventy-four".