74889963581 has 8 divisors (see below), whose sum is σ = 76263240864. Its totient is φ = 73521382320.

The previous prime is 74889963571. The next prime is 74889963601. The reversal of 74889963581 is 18536998847.

It is a happy number.

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 74889963581 - 2⁶ = 74889963517 is a prime.

It is a super-2 number, since 2×74889963581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74889963571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1141811 + ... + 1205616.

It is an arithmetic number, because the mean of its divisors is an integer number (9532905108).

Almost surely, 2^74889963581 is an apocalyptic number.

It is an amenable number.

74889963581 is a deficient number, since it is larger than the sum of its proper divisors (1373277283).

74889963581 is a wasteful number, since it uses less digits than its factorization.

74889963581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348011.

The product of its digits is 104509440, while the sum is 68.

The spelling of 74889963581 in words is "seventy-four billion, eight hundred eighty-nine million, nine hundred sixty-three thousand, five hundred eighty-one".