53781372913 has 2 divisors, whose sum is σ = 53781372914. Its totient is φ = 53781372912.

The previous prime is 53781372901. The next prime is 53781372943. The reversal of 53781372913 is 31927318735.

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., 36249494449 + 17531878464 = 190393^2 + 132408^2 .

It is a cyclic number.

It is not a de Polignac number, because 53781372913 - 2⁹ = 53781372401 is a prime.

It is not a weakly prime, because it can be changed into another prime (53781372943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26890686456 + 26890686457.

It is an arithmetic number, because the mean of its divisors is an integer number (26890686457).

Almost surely, 2^53781372913 is an apocalyptic number.

It is an amenable number.

53781372913 is a deficient number, since it is larger than the sum of its proper divisors (1).

53781372913 is an equidigital number, since it uses as much as digits as its factorization.

53781372913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 49.

The spelling of 53781372913 in words is "fifty-three billion, seven hundred eighty-one million, three hundred seventy-two thousand, nine hundred thirteen".