672305018081 has 8 divisors (see below), whose sum is σ = 675087505920. Its totient is φ = 669523821568.

The previous prime is 672305018071. The next prime is 672305018083. The reversal of 672305018081 is 180810503276.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672305018081 is a prime.

It is a super-2 number, since 2×672305018081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672305018083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727640 + ... + 1368966.

It is an arithmetic number, because the mean of its divisors is an integer number (84385938240).

Almost surely, 2^672305018081 is an apocalyptic number.

It is an amenable number.

672305018081 is a deficient number, since it is larger than the sum of its proper divisors (2782487839).

672305018081 is a wasteful number, since it uses less digits than its factorization.

672305018081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645663.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 672305018081 in words is "six hundred seventy-two billion, three hundred five million, eighteen thousand, eighty-one".