80655969 has 16 divisors (see below), whose sum is σ = 115062080. Its totient is φ = 50103360.

The previous prime is 80655959. The next prime is 80655977. The reversal of 80655969 is 96955608.

It is not a de Polignac number, because 80655969 - 2¹¹ = 80653921 is a prime.

It is a super-4 number, since 4×80655969⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80655959) 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, 8122 + ... + 15075.

It is an arithmetic number, because the mean of its divisors is an integer number (7191380).

Almost surely, 2^80655969 is an apocalyptic number.

It is an amenable number.

80655969 is a deficient number, since it is larger than the sum of its proper divisors (34406111).

80655969 is a wasteful number, since it uses less digits than its factorization.

80655969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23280.

The product of its (nonzero) digits is 583200, while the sum is 48.

The square root of 80655969 is about 8980.8668289871. The cubic root of 80655969 is about 432.0614356643.

The spelling of 80655969 in words is "eighty million, six hundred fifty-five thousand, nine hundred sixty-nine".