74473731847 has 4 divisors (see below), whose sum is σ = 74480456520. Its totient is φ = 74467007176.

The previous prime is 74473731833. The next prime is 74473731863. The reversal of 74473731847 is 74813737447.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74473731847 - 2³¹ = 72326248199 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 (74473731877) 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, 3345697 + ... + 3367882.

It is an arithmetic number, because the mean of its divisors is an integer number (18620114130).

Almost surely, 2^74473731847 is an apocalyptic number.

74473731847 is a deficient number, since it is larger than the sum of its proper divisors (6724673).

74473731847 is a wasteful number, since it uses less digits than its factorization.

74473731847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6724672.

The product of its digits is 11063808, while the sum is 55.

The spelling of 74473731847 in words is "seventy-four billion, four hundred seventy-three million, seven hundred thirty-one thousand, eight hundred forty-seven".