80995374066049 has 9 divisors (see below), whose sum is σ = 81097514669187. Its totient is φ = 80893361979144.

The previous prime is 80995374066037. The next prime is 80995374066053. The reversal of 80995374066049 is 94066047359908.

The square root of 80995374066049 is 8999743.

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., 61440122640625 + 19555251425424 = 7838375^2 + 4422132^2 .

It is a de Polignac number, because none of the positive numbers 2^k-80995374066049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80995374066349) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7730773999 + ... + 7730784475.

It is an arithmetic number, because the mean of its divisors is an integer number (9010834963243).

Almost surely, 2^{80995374066049} is an apocalyptic number.

80995374066049 is the 8999743-rd square number.

80995374066049 is the 4499872-nd centered octagonal number.

It is an amenable number.

80995374066049 is a deficient number, since it is larger than the sum of its proper divisors (102140603138).

80995374066049 is an frugal number, since it uses more digits than its factorization.

80995374066049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22672 (or 11336 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 70.

The spelling of 80995374066049 in words is "eighty trillion, nine hundred ninety-five billion, three hundred seventy-four million, sixty-six thousand, forty-nine".