74973134221 has 8 divisors (see below), whose sum is σ = 76059823424. Its totient is φ = 73893345120.

The previous prime is 74973134209. The next prime is 74973134279. The reversal of 74973134221 is 12243137947.

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 74973134221 - 2²¹ = 74971037069 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 (74973134281) 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, 1703136 + ... + 1746601.

It is an arithmetic number, because the mean of its divisors is an integer number (9507477928).

Almost surely, 2^74973134221 is an apocalyptic number.

It is an amenable number.

74973134221 is a deficient number, since it is larger than the sum of its proper divisors (1086689203).

74973134221 is a wasteful number, since it uses less digits than its factorization.

74973134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450051.

The product of its digits is 254016, while the sum is 43.

The spelling of 74973134221 in words is "seventy-four billion, nine hundred seventy-three million, one hundred thirty-four thousand, two hundred twenty-one".