72726942461 has 2 divisors, whose sum is σ = 72726942462. Its totient is φ = 72726942460.

The previous prime is 72726942427. The next prime is 72726942467. The reversal of 72726942461 is 16424962727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69389569561 + 3337372900 = 263419^2 + 57770^2 .

It is a cyclic number.

It is not a de Polignac number, because 72726942461 - 2¹⁰ = 72726941437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72726942467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36363471230 + 36363471231.

It is an arithmetic number, because the mean of its divisors is an integer number (36363471231).

Almost surely, 2^72726942461 is an apocalyptic number.

It is an amenable number.

72726942461 is a deficient number, since it is larger than the sum of its proper divisors (1).

72726942461 is an equidigital number, since it uses as much as digits as its factorization.

72726942461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 50.

The spelling of 72726942461 in words is "seventy-two billion, seven hundred twenty-six million, nine hundred forty-two thousand, four hundred sixty-one".