721045540141 has 2 divisors, whose sum is σ = 721045540142. Its totient is φ = 721045540140.

The previous prime is 721045540123. The next prime is 721045540153. The reversal of 721045540141 is 141045540127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428964742116 + 292080798025 = 654954^2 + 540445^2 .

It is a cyclic number.

It is not a de Polignac number, because 721045540141 - 2⁷ = 721045540013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 721045540097 and 721045540106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721045540181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360522770070 + 360522770071.

It is an arithmetic number, because the mean of its divisors is an integer number (360522770071).

Almost surely, 2^721045540141 is an apocalyptic number.

It is an amenable number.

721045540141 is a deficient number, since it is larger than the sum of its proper divisors (1).

721045540141 is an equidigital number, since it uses as much as digits as its factorization.

721045540141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 34.

The spelling of 721045540141 in words is "seven hundred twenty-one billion, forty-five million, five hundred forty thousand, one hundred forty-one".