74778110783423 has 4 divisors (see below), whose sum is σ = 74778153069480. Its totient is φ = 74778068497368.

The previous prime is 74778110783419. The next prime is 74778110783429. The reversal of 74778110783423 is 32438701187747.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74778110783423 - 2² = 74778110783419 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 (74778110783429) 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, 18369140 + ... + 22067657.

It is an arithmetic number, because the mean of its divisors is an integer number (18694538267370).

Almost surely, 2^{74778110783423} is an apocalyptic number.

74778110783423 is a deficient number, since it is larger than the sum of its proper divisors (42286057).

74778110783423 is a wasteful number, since it uses less digits than its factorization.

74778110783423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42286056.

The product of its (nonzero) digits is 44255232, while the sum is 62.

The spelling of 74778110783423 in words is "seventy-four trillion, seven hundred seventy-eight billion, one hundred ten million, seven hundred eighty-three thousand, four hundred twenty-three".