74320576549 has 4 divisors (see below), whose sum is σ = 76133273580. Its totient is φ = 72507879520.

The previous prime is 74320576513. The next prime is 74320576553. The reversal of 74320576549 is 94567502347.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43678074049 + 30642502500 = 208993^2 + 175050^2 .

It is a cyclic number.

It is not a de Polignac number, because 74320576549 - 2⁹ = 74320576037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74320576496 and 74320576505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74320576559) 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, 906348454 + ... + 906348535.

It is an arithmetic number, because the mean of its divisors is an integer number (19033318395).

Almost surely, 2^74320576549 is an apocalyptic number.

It is an amenable number.

74320576549 is a deficient number, since it is larger than the sum of its proper divisors (1812697031).

74320576549 is a wasteful number, since it uses less digits than its factorization.

74320576549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812697030.

The product of its (nonzero) digits is 6350400, while the sum is 52.

The spelling of 74320576549 in words is "seventy-four billion, three hundred twenty million, five hundred seventy-six thousand, five hundred forty-nine".