53733046921 has 2 divisors, whose sum is σ = 53733046922. Its totient is φ = 53733046920.

The previous prime is 53733046903. The next prime is 53733046951. The reversal of 53733046921 is 12964033735.

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., 40718800521 + 13014246400 = 201789^2 + 114080^2 .

It is a cyclic number.

It is not a de Polignac number, because 53733046921 - 2⁷ = 53733046793 is a prime.

It is not a weakly prime, because it can be changed into another prime (53733046951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26866523460 + 26866523461.

It is an arithmetic number, because the mean of its divisors is an integer number (26866523461).

Almost surely, 2^53733046921 is an apocalyptic number.

It is an amenable number.

53733046921 is a deficient number, since it is larger than the sum of its proper divisors (1).

53733046921 is an equidigital number, since it uses as much as digits as its factorization.

53733046921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 43.

The spelling of 53733046921 in words is "fifty-three billion, seven hundred thirty-three million, forty-six thousand, nine hundred twenty-one".