109776781423 has 2 divisors, whose sum is σ = 109776781424. Its totient is φ = 109776781422.

The previous prime is 109776781409. The next prime is 109776781451. The reversal of 109776781423 is 324187677901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109776781423 - 2¹³ = 109776773231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109776581423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54888390711 + 54888390712.

It is an arithmetic number, because the mean of its divisors is an integer number (54888390712).

Almost surely, 2^109776781423 is an apocalyptic number.

109776781423 is a deficient number, since it is larger than the sum of its proper divisors (1).

109776781423 is an equidigital number, since it uses as much as digits as its factorization.

109776781423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3556224, while the sum is 55.

The spelling of 109776781423 in words is "one hundred nine billion, seven hundred seventy-six million, seven hundred eighty-one thousand, four hundred twenty-three".