80651009 has 8 divisors (see below), whose sum is σ = 87703848. Its totient is φ = 73854720.

The previous prime is 80651003. The next prime is 80651027. The reversal of 80651009 is 90015608.

It can be written as a sum of positive squares in 4 ways, for example, as 38440000 + 42211009 = 6200^2 + 6497^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80651009 - 2⁴ = 80650993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80651003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63482 + ... + 64739.

It is an arithmetic number, because the mean of its divisors is an integer number (10962981).

Almost surely, 2^80651009 is an apocalyptic number.

It is an amenable number.

80651009 is a deficient number, since it is larger than the sum of its proper divisors (7052839).

80651009 is a wasteful number, since it uses less digits than its factorization.

80651009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128275.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 80651009 is about 8980.5906821322. The cubic root of 80651009 is about 432.0525788341.

It can be divided in two parts, 806 and 51009, that added together give a palindrome (51815).

The spelling of 80651009 in words is "eighty million, six hundred fifty-one thousand, nine".