80605256109849 has 27 divisors (see below), whose sum is σ = 116572731429973. Its totient is φ = 53670956527032.

The previous prime is 80605256109793. The next prime is 80605256109853. The reversal of 80605256109849 is 94890165250608.

The square root of 80605256109849 is 8978043.

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

80605256109849 is a `hidden beast` number, since 8 + 0 + 6 + 0 + 5 + 2 + 5 + 610 + 9 + 8 + 4 + 9 = 666.

It is not a de Polignac number, because 80605256109849 - 2²¹ = 80605254012697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80605256101849) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 32940438544 + ... + 32940440990.

Almost surely, 2^{80605256109849} is an apocalyptic number.

80605256109849 is the 8978043-rd square number.

80605256109849 is the 4489022-nd centered octagonal number.

It is an amenable number.

80605256109849 is a deficient number, since it is larger than the sum of its proper divisors (35967475320124).

80605256109849 is an frugal number, since it uses more digits than its factorization.

80605256109849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7346 (or 3673 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 63.

The spelling of 80605256109849 in words is "eighty trillion, six hundred five billion, two hundred fifty-six million, one hundred nine thousand, eight hundred forty-nine".