74894552779 has 4 divisors (see below), whose sum is σ = 74895144184. Its totient is φ = 74893961376.

The previous prime is 74894552771. The next prime is 74894552857. The reversal of 74894552779 is 97725549847.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 97725549847 = 53 ⋅1843878299.

It is a cyclic number.

It is not a de Polignac number, because 74894552779 - 2³ = 74894552771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74894552771) 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, 20157 + ... + 387550.

It is an arithmetic number, because the mean of its divisors is an integer number (18723786046).

Almost surely, 2^74894552779 is an apocalyptic number.

74894552779 is a deficient number, since it is larger than the sum of its proper divisors (591405).

74894552779 is a wasteful number, since it uses less digits than its factorization.

74894552779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591404.

The product of its digits is 177811200, while the sum is 67.

The spelling of 74894552779 in words is "seventy-four billion, eight hundred ninety-four million, five hundred fifty-two thousand, seven hundred seventy-nine".