8646434640 has 80 divisors (see below), whose sum is σ = 29782171200. Its totient is φ = 2305715328.

The previous prime is 8646434611. The next prime is 8646434647. The reversal of 8646434640 is 464346468.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8646434647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1999330 + ... + 2003649.

It is an arithmetic number, because the mean of its divisors is an integer number (372277140).

Almost surely, 2^8646434640 is an apocalyptic number.

8646434640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8646434640 is an abundant number, since it is smaller than the sum of its proper divisors (21135736560).

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

8646434640 is a wasteful number, since it uses less digits than its factorization.

8646434640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4003001 (or 4002989 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 45.

The square root of 8646434640 is about 92986.2067190613. The cubic root of 8646434640 is about 2052.4804114398.

It can be divided in two parts, 86464 and 34640, that added together give a square (121104 = 348²).

The spelling of 8646434640 in words is "eight billion, six hundred forty-six million, four hundred thirty-four thousand, six hundred forty".