53378681663 has 2 divisors, whose sum is σ = 53378681664. Its totient is φ = 53378681662.

The previous prime is 53378681621. The next prime is 53378681669. The reversal of 53378681663 is 36618687335.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53378681663 - 2⁸ = 53378681407 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 53378681599 and 53378681608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53378681669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26689340831 + 26689340832.

It is an arithmetic number, because the mean of its divisors is an integer number (26689340832).

Almost surely, 2^53378681663 is an apocalyptic number.

53378681663 is a deficient number, since it is larger than the sum of its proper divisors (1).

53378681663 is an equidigital number, since it uses as much as digits as its factorization.

53378681663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 56.

The spelling of 53378681663 in words is "fifty-three billion, three hundred seventy-eight million, six hundred eighty-one thousand, six hundred sixty-three".