74188841981 has 8 divisors (see below), whose sum is σ = 76773020928. Its totient is φ = 71616600000.

The previous prime is 74188841939. The next prime is 74188842017. The reversal of 74188841981 is 18914888147.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74188841981 - 2⁶ = 74188841917 is a prime.

It is a super-2 number, since 2×74188841981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74188841981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74188841921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2971595 + ... + 2996456.

It is an arithmetic number, because the mean of its divisors is an integer number (9596627616).

Almost surely, 2^74188841981 is an apocalyptic number.

It is an amenable number.

74188841981 is a deficient number, since it is larger than the sum of its proper divisors (2584178947).

74188841981 is a wasteful number, since it uses less digits than its factorization.

74188841981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968483.

The product of its digits is 4128768, while the sum is 59.

The spelling of 74188841981 in words is "seventy-four billion, one hundred eighty-eight million, eight hundred forty-one thousand, nine hundred eighty-one".