87474644647478 has 16 divisors (see below), whose sum is σ = 146185866491904. Its totient is φ = 38915219088360.

The previous prime is 87474644647463. The next prime is 87474644647499.

87474644647478 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42299150150 + ... + 42299152217.

It is an arithmetic number, because the mean of its divisors is an integer number (9136616655744).

Almost surely, 2^{87474644647478} is an apocalyptic number.

87474644647478 is a deficient number, since it is larger than the sum of its proper divisors (58711221844426).

87474644647478 is a wasteful number, since it uses less digits than its factorization.

87474644647478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84598302427.

The product of its digits is 22658678784, while the sum is 80.

The spelling of 87474644647478 in words is "eighty-seven trillion, four hundred seventy-four billion, six hundred forty-four million, six hundred forty-seven thousand, four hundred seventy-eight".