4938509793661 has 2 divisors, whose sum is σ = 4938509793662. Its totient is φ = 4938509793660.

The previous prime is 4938509793641. The next prime is 4938509793673. The reversal of 4938509793661 is 1663979058394.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2543115931225 + 2395393862436 = 1594715^2 + 1547706^2 .

It is a cyclic number.

It is not a de Polignac number, because 4938509793661 - 2¹⁹ = 4938509269373 is a prime.

It is a super-2 number, since 2×4938509793661² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4938509793641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2469254896830 + 2469254896831.

It is an arithmetic number, because the mean of its divisors is an integer number (2469254896831).

Almost surely, 2^{4938509793661} is an apocalyptic number.

It is an amenable number.

4938509793661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4938509793661 is an equidigital number, since it uses as much as digits as its factorization.

4938509793661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264539520, while the sum is 70.

The spelling of 4938509793661 in words is "four trillion, nine hundred thirty-eight billion, five hundred nine million, seven hundred ninety-three thousand, six hundred sixty-one".