87847018646 has 16 divisors (see below), whose sum is σ = 134858490624. Its totient is φ = 42894545064.

The previous prime is 87847018627. The next prime is 87847018657. The reversal of 87847018646 is 64681074878.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423551 + ... + 595893.

It is an arithmetic number, because the mean of its divisors is an integer number (8428655664).

Almost surely, 2^87847018646 is an apocalyptic number.

87847018646 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

87847018646 is a deficient number, since it is larger than the sum of its proper divisors (47011471978).

87847018646 is a wasteful number, since it uses less digits than its factorization.

87847018646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178315.

The product of its (nonzero) digits is 14450688, while the sum is 59.

The spelling of 87847018646 in words is "eighty-seven billion, eight hundred forty-seven million, eighteen thousand, six hundred forty-six".