74845048981 has 4 divisors (see below), whose sum is σ = 74903114700. Its totient is φ = 74786983264.

The previous prime is 74845048969. The next prime is 74845048987. The reversal of 74845048981 is 18984054847.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40252396900 + 34592652081 = 200630^2 + 185991^2 .

It is a cyclic number.

It is not a de Polignac number, because 74845048981 - 2⁷ = 74845048853 is a prime.

It is a super-2 number, since 2×74845048981² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74845048987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29030926 + ... + 29033503.

It is an arithmetic number, because the mean of its divisors is an integer number (18725778675).

Almost surely, 2^74845048981 is an apocalyptic number.

It is an amenable number.

74845048981 is a deficient number, since it is larger than the sum of its proper divisors (58065719).

74845048981 is a wasteful number, since it uses less digits than its factorization.

74845048981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58065718.

The product of its (nonzero) digits is 10321920, while the sum is 58.

The spelling of 74845048981 in words is "seventy-four billion, eight hundred forty-five million, forty-eight thousand, nine hundred eighty-one".