8646342640 has 40 divisors (see below), whose sum is σ = 21649114368. Its totient is φ = 3192495360.

The previous prime is 8646342629. The next prime is 8646342671. The reversal of 8646342640 is 462436468.

8646342640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 4155856 + ... + 4157935.

Almost surely, 2^8646342640 is an apocalyptic number.

8646342640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8646342640 is an abundant number, since it is smaller than the sum of its proper divisors (13002771728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8646342640 is a wasteful number, since it uses less digits than its factorization.

8646342640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8313817 (or 8313811 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 43.

The square root of 8646342640 is about 92985.7120207185. The cubic root of 8646342640 is about 2052.4731317970.

The spelling of 8646342640 in words is "eight billion, six hundred forty-six million, three hundred forty-two thousand, six hundred forty".