53400064021 has 2 divisors, whose sum is σ = 53400064022. Its totient is φ = 53400064020.

The previous prime is 53400064013. The next prime is 53400064049. The reversal of 53400064021 is 12046000435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27835251921 + 25564812100 = 166839^2 + 159890^2 .

It is a cyclic number.

It is not a de Polignac number, because 53400064021 - 2³ = 53400064013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53400064061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26700032010 + 26700032011.

It is an arithmetic number, because the mean of its divisors is an integer number (26700032011).

Almost surely, 2^53400064021 is an apocalyptic number.

It is an amenable number.

53400064021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53400064021 is an equidigital number, since it uses as much as digits as its factorization.

53400064021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 53400064021 its reverse (12046000435), we get a palindrome (65446064456).

The spelling of 53400064021 in words is "fifty-three billion, four hundred million, sixty-four thousand, twenty-one".