74241378673 has 72 divisors (see below), whose sum is σ = 99249239040. Its totient is φ = 55264809600.

The previous prime is 74241378643. The next prime is 74241378683. The reversal of 74241378673 is 37687314247.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-74241378673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74241378673.

It is not an unprimeable number, because it can be changed into a prime (74241378643) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 14517565 + ... + 14522677.

Almost surely, 2^74241378673 is an apocalyptic number.

It is an amenable number.

74241378673 is a deficient number, since it is larger than the sum of its proper divisors (25007860367).

74241378673 is a wasteful number, since it uses less digits than its factorization.

74241378673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5259 (or 5241 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 52.

The spelling of 74241378673 in words is "seventy-four billion, two hundred forty-one million, three hundred seventy-eight thousand, six hundred seventy-three".