80185642664506 has 8 divisors (see below), whose sum is σ = 120278510565300. Its totient is φ = 40092805809408.

The previous prime is 80185642664489. The next prime is 80185642664507. The reversal of 80185642664506 is 60546624658108.

It can be written as a sum of positive squares in 2 ways, for example, as 71329155944281 + 8856486720225 = 8445659^2 + 2975985^2 .

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

It is not an unprimeable number, because it can be changed into a prime (80185642664507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420820 + ... + 12670768.

Almost surely, 2^{80185642664506} is an apocalyptic number.

80185642664506 is a deficient number, since it is larger than the sum of its proper divisors (40092867900794).

80185642664506 is a wasteful number, since it uses less digits than its factorization.

80185642664506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15522848.

The product of its (nonzero) digits is 66355200, while the sum is 61.

The spelling of 80185642664506 in words is "eighty trillion, one hundred eighty-five billion, six hundred forty-two million, six hundred sixty-four thousand, five hundred six".