109778785429 has 4 divisors (see below), whose sum is σ = 110216151360. Its totient is φ = 109341419500.

The previous prime is 109778785397. The next prime is 109778785463. The reversal of 109778785429 is 924587877901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 924587877901 = 527803 ⋅1751767.

It is a cyclic number.

It is not a de Polignac number, because 109778785429 - 2⁵ = 109778785397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109778785229) 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 in 3 ways as a sum of consecutive naturals, for example, 218682589 + ... + 218683090.

It is an arithmetic number, because the mean of its divisors is an integer number (27554037840).

Almost surely, 2^109778785429 is an apocalyptic number.

It is an amenable number.

109778785429 is a deficient number, since it is larger than the sum of its proper divisors (437365931).

109778785429 is an equidigital number, since it uses as much as digits as its factorization.

109778785429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437365930.

The product of its (nonzero) digits is 71124480, while the sum is 67.

The spelling of 109778785429 in words is "one hundred nine billion, seven hundred seventy-eight million, seven hundred eighty-five thousand, four hundred twenty-nine".