87645558646 has 16 divisors (see below), whose sum is σ = 133687295280. Its totient is φ = 43089265440.

The previous prime is 87645558563. The next prime is 87645558667. The reversal of 87645558646 is 64685554678.

It is a happy number.

It is a congruent 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 in 7 ways as a sum of consecutive naturals, for example, 1505961 + ... + 1563076.

It is an arithmetic number, because the mean of its divisors is an integer number (8355455955).

Almost surely, 2^87645558646 is an apocalyptic number.

87645558646 is a deficient number, since it is larger than the sum of its proper divisors (46041736634).

87645558646 is a wasteful number, since it uses less digits than its factorization.

87645558646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069279.

The product of its digits is 193536000, while the sum is 64.

The spelling of 87645558646 in words is "eighty-seven billion, six hundred forty-five million, five hundred fifty-eight thousand, six hundred forty-six".