74391406749 has 20 divisors (see below), whose sum is σ = 121230442080. Its totient is φ = 45085700520.

The previous prime is 74391406723. The next prime is 74391406801. The reversal of 74391406749 is 94760419347.

74391406749 is a `hidden beast` number, since 7 + 439 + 140 + 67 + 4 + 9 = 666.

It is not a de Polignac number, because 74391406749 - 2²⁴ = 74374629533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74391406695 and 74391406704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74391406049) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 41745129 + ... + 41746910.

It is an arithmetic number, because the mean of its divisors is an integer number (6061522104).

Almost surely, 2^74391406749 is an apocalyptic number.

It is an amenable number.

74391406749 is a deficient number, since it is larger than the sum of its proper divisors (46839035331).

74391406749 is a wasteful number, since it uses less digits than its factorization.

74391406749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83492062 (or 83492053 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 74391406749 in words is "seventy-four billion, three hundred ninety-one million, four hundred six thousand, seven hundred forty-nine".