4773678020521 has 2 divisors, whose sum is σ = 4773678020522. Its totient is φ = 4773678020520.

The previous prime is 4773678020519. The next prime is 4773678020557. The reversal of 4773678020521 is 1250208763774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2389853187225 + 2383824833296 = 1545915^2 + 1543964^2 .

It is a cyclic number.

It is not a de Polignac number, because 4773678020521 - 2¹ = 4773678020519 is a prime.

It is a super-2 number, since 2×4773678020521² (a number of 26 digits) contains 22 as substring.

Together with 4773678020519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4773678060521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2386839010260 + 2386839010261.

It is an arithmetic number, because the mean of its divisors is an integer number (2386839010261).

Almost surely, 2^{4773678020521} is an apocalyptic number.

It is an amenable number.

4773678020521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4773678020521 is an equidigital number, since it uses as much as digits as its factorization.

4773678020521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3951360, while the sum is 52.

The spelling of 4773678020521 in words is "four trillion, seven hundred seventy-three billion, six hundred seventy-eight million, twenty thousand, five hundred twenty-one".