1656813378023 has 2 divisors, whose sum is σ = 1656813378024. Its totient is φ = 1656813378022.

The previous prime is 1656813377981. The next prime is 1656813378029. The reversal of 1656813378023 is 3208733186561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1656813378023 - 2⁶ = 1656813377959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1656813378029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828406689011 + 828406689012.

It is an arithmetic number, because the mean of its divisors is an integer number (828406689012).

Almost surely, 2^{1656813378023} is an apocalyptic number.

1656813378023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656813378023 is an equidigital number, since it uses as much as digits as its factorization.

1656813378023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 1656813378023 in words is "one trillion, six hundred fifty-six billion, eight hundred thirteen million, three hundred seventy-eight thousand, twenty-three".