53673530621 has 2 divisors, whose sum is σ = 53673530622. Its totient is φ = 53673530620.

The previous prime is 53673530609. The next prime is 53673530627. The reversal of 53673530621 is 12603537635.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30279828121 + 23393702500 = 174011^2 + 152950^2 .

It is a cyclic number.

It is not a de Polignac number, because 53673530621 - 2¹⁰ = 53673529597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53673530627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26836765310 + 26836765311.

It is an arithmetic number, because the mean of its divisors is an integer number (26836765311).

Almost surely, 2^53673530621 is an apocalyptic number.

It is an amenable number.

53673530621 is a deficient number, since it is larger than the sum of its proper divisors (1).

53673530621 is an equidigital number, since it uses as much as digits as its factorization.

53673530621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 340200, while the sum is 41.

The spelling of 53673530621 in words is "fifty-three billion, six hundred seventy-three million, five hundred thirty thousand, six hundred twenty-one".