74170709649 has 27 divisors (see below), whose sum is σ = 112024440073. Its totient is φ = 47285281032.

The previous prime is 74170709573. The next prime is 74170709663. The reversal of 74170709649 is 94690707147.

The square root of 74170709649 is 272343.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 74170709649 - 2²⁹ = 73633838737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74170709595 and 74170709604.

It is not an unprimeable number, because it can be changed into a prime (74170709689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18789694 + ... + 18793640.

Almost surely, 2^74170709649 is an apocalyptic number.

74170709649 is the 272343-rd square number.

74170709649 is the 136172-nd centered octagonal number.

It is an amenable number.

74170709649 is a deficient number, since it is larger than the sum of its proper divisors (37853730424).

74170709649 is an frugal number, since it uses more digits than its factorization.

74170709649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7946 (or 3973 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 54.

The spelling of 74170709649 in words is "seventy-four billion, one hundred seventy million, seven hundred nine thousand, six hundred forty-nine".