8049942166564 has 9 divisors (see below), whose sum is σ = 14087408721841. Its totient is φ = 4024968246040.

The previous prime is 8049942166561. The next prime is 8049942166571. The reversal of 8049942166564 is 4656612499408.

The square root of 8049942166564 is 2837242.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7939106440164 + 110835726400 = 2817642^2 + 332920^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8049942166496 and 8049942166505.

It is not an unprimeable number, because it can be changed into a prime (8049942166561) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4965174 + ... + 6383794.

Almost surely, 2^{8049942166564} is an apocalyptic number.

8049942166564 is the 2837242-nd square number.

It is an amenable number.

8049942166564 is a deficient number, since it is larger than the sum of its proper divisors (6037466555277).

8049942166564 is an frugal number, since it uses more digits than its factorization.

8049942166564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837246 (or 1418623 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 64.

Multiplying 8049942166564 by its sum of digits (64), we get a square (515196298660096 = 22697936²).

The spelling of 8049942166564 in words is "eight trillion, forty-nine billion, nine hundred forty-two million, one hundred sixty-six thousand, five hundred sixty-four".