7286321681 has 8 divisors (see below), whose sum is σ = 7484346240. Its totient is φ = 7088354928.

The previous prime is 7286321629. The next prime is 7286321773. The reversal of 7286321681 is 1861236827.

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 7286321681 - 2¹⁴ = 7286305297 is a prime.

It is a super-2 number, since 2×7286321681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7286321881) 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, 400280 + ... + 418086.

It is an arithmetic number, because the mean of its divisors is an integer number (935543280).

Almost surely, 2^7286321681 is an apocalyptic number.

It is an amenable number.

7286321681 is a deficient number, since it is larger than the sum of its proper divisors (198024559).

7286321681 is a wasteful number, since it uses less digits than its factorization.

7286321681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28903.

The product of its digits is 193536, while the sum is 44.

The square root of 7286321681 is about 85359.9536140924. The cubic root of 7286321681 is about 1938.6650469018.

The spelling of 7286321681 in words is "seven billion, two hundred eighty-six million, three hundred twenty-one thousand, six hundred eighty-one".