72711466126421 has 2 divisors, whose sum is σ = 72711466126422. Its totient is φ = 72711466126420.

The previous prime is 72711466126393. The next prime is 72711466126433. The reversal of 72711466126421 is 12462166411727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61429760745796 + 11281705380625 = 7837714^2 + 3358825^2 .

It is a cyclic number.

It is not a de Polignac number, because 72711466126421 - 2¹⁴ = 72711466110037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72711466126421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72711466126121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36355733063210 + 36355733063211.

It is an arithmetic number, because the mean of its divisors is an integer number (36355733063211).

Almost surely, 2^{72711466126421} is an apocalyptic number.

It is an amenable number.

72711466126421 is a deficient number, since it is larger than the sum of its proper divisors (1).

72711466126421 is an equidigital number, since it uses as much as digits as its factorization.

72711466126421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 50.

The spelling of 72711466126421 in words is "seventy-two trillion, seven hundred eleven billion, four hundred sixty-six million, one hundred twenty-six thousand, four hundred twenty-one".