721796054401 has 2 divisors, whose sum is σ = 721796054402. Its totient is φ = 721796054400.

The previous prime is 721796054351. The next prime is 721796054407. The reversal of 721796054401 is 104450697127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 682195054401 + 39601000000 = 825951^2 + 199000^2 .

It is a cyclic number.

It is not a de Polignac number, because 721796054401 - 2⁹ = 721796053889 is a prime.

It is not a weakly prime, because it can be changed into another prime (721796054407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360898027200 + 360898027201.

It is an arithmetic number, because the mean of its divisors is an integer number (360898027201).

Almost surely, 2^721796054401 is an apocalyptic number.

It is an amenable number.

721796054401 is a deficient number, since it is larger than the sum of its proper divisors (1).

721796054401 is an equidigital number, since it uses as much as digits as its factorization.

721796054401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 721796054401 in words is "seven hundred twenty-one billion, seven hundred ninety-six million, fifty-four thousand, four hundred one".