8646109516674 has 72 divisors (see below), whose sum is σ = 21804391080108. Its totient is φ = 2468881175040.

The previous prime is 8646109516673. The next prime is 8646109516703. The reversal of 8646109516674 is 4766159016468.

It is a happy number.

8646109516674 is a `hidden beast` number, since 8 + 6 + 4 + 6 + 109 + 516 + 6 + 7 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7838079317649 + 808030199025 = 2799657^2 + 898905^2 .

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (8646109516673) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1330087 + ... + 4365930.

Almost surely, 2^{8646109516674} is an apocalyptic number.

8646109516674 is an abundant number, since it is smaller than the sum of its proper divisors (13158281563434).

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

8646109516674 is a wasteful number, since it uses less digits than its factorization.

8646109516674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5697760 (or 5697750 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

It can be divided in two parts, 864610 and 9516674, that added together give a square (10381284 = 3222²).

The spelling of 8646109516674 in words is "eight trillion, six hundred forty-six billion, one hundred nine million, five hundred sixteen thousand, six hundred seventy-four".