53216974729 has 2 divisors, whose sum is σ = 53216974730. Its totient is φ = 53216974728.

The previous prime is 53216974691. The next prime is 53216974751. The reversal of 53216974729 is 92747961235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44701376329 + 8515598400 = 211427^2 + 92280^2 .

It is a cyclic number.

It is not a de Polignac number, because 53216974729 - 2¹⁵ = 53216941961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53216974729.

It is not a weakly prime, because it can be changed into another prime (53216971729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26608487364 + 26608487365.

It is an arithmetic number, because the mean of its divisors is an integer number (26608487365).

Almost surely, 2^53216974729 is an apocalyptic number.

It is an amenable number.

53216974729 is a deficient number, since it is larger than the sum of its proper divisors (1).

53216974729 is an equidigital number, since it uses as much as digits as its factorization.

53216974729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 55.

The spelling of 53216974729 in words is "fifty-three billion, two hundred sixteen million, nine hundred seventy-four thousand, seven hundred twenty-nine".