74784768820109 has 4 divisors (see below), whose sum is σ = 74820671255616. Its totient is φ = 74748866384604.

The previous prime is 74784768820093. The next prime is 74784768820193. The reversal of 74784768820109 is 90102886748747.

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.

It is a cyclic number.

It is not a de Polignac number, because 74784768820109 - 2⁴ = 74784768820093 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 (74784768823109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17951214629 + ... + 17951218794.

It is an arithmetic number, because the mean of its divisors is an integer number (18705167813904).

Almost surely, 2^{74784768820109} is an apocalyptic number.

It is an amenable number.

74784768820109 is a deficient number, since it is larger than the sum of its proper divisors (35902435507).

74784768820109 is a wasteful number, since it uses less digits than its factorization.

74784768820109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35902435506.

The product of its (nonzero) digits is 303464448, while the sum is 71.

The spelling of 74784768820109 in words is "seventy-four trillion, seven hundred eighty-four billion, seven hundred sixty-eight million, eight hundred twenty thousand, one hundred nine".