53603665351021 has 2 divisors, whose sum is σ = 53603665351022. Its totient is φ = 53603665351020.

The previous prime is 53603665350979. The next prime is 53603665351043. The reversal of 53603665351021 is 12015356630635.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52953069856996 + 650595494025 = 7276886^2 + 806595^2 .

It is a cyclic number.

It is not a de Polignac number, because 53603665351021 - 2³⁹ = 53053909537133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53603665351081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26801832675510 + 26801832675511.

It is an arithmetic number, because the mean of its divisors is an integer number (26801832675511).

Almost surely, 2^{53603665351021} is an apocalyptic number.

It is an amenable number.

53603665351021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53603665351021 is an equidigital number, since it uses as much as digits as its factorization.

53603665351021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458000, while the sum is 46.

The spelling of 53603665351021 in words is "fifty-three trillion, six hundred three billion, six hundred sixty-five million, three hundred fifty-one thousand, twenty-one".