74147783621 has 8 divisors (see below), whose sum is σ = 74271821184. Its totient is φ = 74023845840.

The previous prime is 74147783561. The next prime is 74147783639. The reversal of 74147783621 is 12638774147.

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 74147783621 - 2⁶ = 74147783557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74147783621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74147783681) 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 7 ways as a sum of consecutive naturals, for example, 1543856 + ... + 1591158.

It is an arithmetic number, because the mean of its divisors is an integer number (9283977648).

Almost surely, 2^74147783621 is an apocalyptic number.

It is an amenable number.

74147783621 is a deficient number, since it is larger than the sum of its proper divisors (124037563).

74147783621 is a wasteful number, since it uses less digits than its factorization.

74147783621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49891.

The product of its digits is 1580544, while the sum is 50.

The spelling of 74147783621 in words is "seventy-four billion, one hundred forty-seven million, seven hundred eighty-three thousand, six hundred twenty-one".