7180419721 has 2 divisors, whose sum is σ = 7180419722. Its totient is φ = 7180419720.

The previous prime is 7180419661. The next prime is 7180419737. The reversal of 7180419721 is 1279140817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6746322496 + 434097225 = 82136^2 + 20835^2 .

It is a cyclic number.

It is not a de Polignac number, because 7180419721 - 2¹³ = 7180411529 is a prime.

It is not a weakly prime, because it can be changed into another prime (7180419781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3590209860 + 3590209861.

It is an arithmetic number, because the mean of its divisors is an integer number (3590209861).

Almost surely, 2^7180419721 is an apocalyptic number.

It is an amenable number.

7180419721 is a deficient number, since it is larger than the sum of its proper divisors (1).

7180419721 is an equidigital number, since it uses as much as digits as its factorization.

7180419721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 7180419721 is about 84737.3572929909. The cubic root of 7180419721 is about 1929.2267586251.

The spelling of 7180419721 in words is "seven billion, one hundred eighty million, four hundred nineteen thousand, seven hundred twenty-one".