8005721140251 has 12 divisors (see below), whose sum is σ = 11563914562512. Its totient is φ = 5337103517136.

The previous prime is 8005721140247. The next prime is 8005721140253. The reversal of 8005721140251 is 1520411275008.

It is a happy number.

8005721140251 is a `hidden beast` number, since 80 + 0 + 572 + 1 + 1 + 4 + 0 + 2 + 5 + 1 = 666.

It is not a de Polignac number, because 8005721140251 - 2² = 8005721140247 is a prime.

It is a super-2 number, since 2×8005721140251² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8005721140253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2484591 + ... + 4710056.

It is an arithmetic number, because the mean of its divisors is an integer number (963659546876).

Almost surely, 2^{8005721140251} is an apocalyptic number.

8005721140251 is a deficient number, since it is larger than the sum of its proper divisors (3558193422261).

8005721140251 is a wasteful number, since it uses less digits than its factorization.

8005721140251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7318290 (or 7318287 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The spelling of 8005721140251 in words is "eight trillion, five billion, seven hundred twenty-one million, one hundred forty thousand, two hundred fifty-one".