74774745 has 24 divisors (see below), whose sum is σ = 134412096. Its totient is φ = 39879216.

The previous prime is 74774741. The next prime is 74774767. The reversal of 74774745 is 54747747.

It is not a de Polignac number, because 74774745 - 2² = 74774741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 74774745.

It is not an unprimeable number, because it can be changed into a prime (74774741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29557 + ... + 31986.

It is an arithmetic number, because the mean of its divisors is an integer number (5600504).

Almost surely, 2^74774745 is an apocalyptic number.

It is an amenable number.

74774745 is a deficient number, since it is larger than the sum of its proper divisors (59637351).

74774745 is an equidigital number, since it uses as much as digits as its factorization.

74774745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61563 (or 61551 counting only the distinct ones).

The product of its digits is 768320, while the sum is 45.

The square root of 74774745 is about 8647.2391547823. The cubic root of 74774745 is about 421.2937149936.

74774745 divided by its sum of digits (45) gives a palindrome (1661661).

The spelling of 74774745 in words is "seventy-four million, seven hundred seventy-four thousand, seven hundred forty-five".