74128025849 has 4 divisors (see below), whose sum is σ = 74179256064. Its totient is φ = 74076795636.

The previous prime is 74128025831. The next prime is 74128025899. The reversal of 74128025849 is 94852082147.

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 74128025849 - 2⁸ = 74128025593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74128025797 and 74128025806.

It is not an unprimeable number, because it can be changed into a prime (74128025899) 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, 25612937 + ... + 25615830.

It is an arithmetic number, because the mean of its divisors is an integer number (18544814016).

Almost surely, 2^74128025849 is an apocalyptic number.

It is an amenable number.

74128025849 is a deficient number, since it is larger than the sum of its proper divisors (51230215).

74128025849 is a wasteful number, since it uses less digits than its factorization.

74128025849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51230214.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 74128025849 in words is "seventy-four billion, one hundred twenty-eight million, twenty-five thousand, eight hundred forty-nine".