74708519221 has 4 divisors (see below), whose sum is σ = 85381164832. Its totient is φ = 64035873612.

The previous prime is 74708519219. The next prime is 74708519257. The reversal of 74708519221 is 12291580747.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12291580747 = 151 ⋅81401197.

It is a cyclic number.

It is not a de Polignac number, because 74708519221 - 2¹ = 74708519219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74708519021) 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, 5336322795 + ... + 5336322808.

It is an arithmetic number, because the mean of its divisors is an integer number (21345291208).

Almost surely, 2^74708519221 is an apocalyptic number.

It is an amenable number.

74708519221 is a deficient number, since it is larger than the sum of its proper divisors (10672645611).

74708519221 is a wasteful number, since it uses less digits than its factorization.

74708519221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10672645610.

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 74708519221 in words is "seventy-four billion, seven hundred eight million, five hundred nineteen thousand, two hundred twenty-one".