53418882721 has 2 divisors, whose sum is σ = 53418882722. Its totient is φ = 53418882720.

The previous prime is 53418882709. The next prime is 53418882763. The reversal of 53418882721 is 12728881435.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52649597025 + 769285696 = 229455^2 + 27736^2 .

It is a cyclic number.

It is not a de Polignac number, because 53418882721 - 2¹¹ = 53418880673 is a prime.

It is not a weakly prime, because it can be changed into another prime (53418886721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26709441360 + 26709441361.

It is an arithmetic number, because the mean of its divisors is an integer number (26709441361).

Almost surely, 2^53418882721 is an apocalyptic number.

It is an amenable number.

53418882721 is a deficient number, since it is larger than the sum of its proper divisors (1).

53418882721 is an equidigital number, since it uses as much as digits as its factorization.

53418882721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 860160, while the sum is 49.

The spelling of 53418882721 in words is "fifty-three billion, four hundred eighteen million, eight hundred eighty-two thousand, seven hundred twenty-one".