39801447009 has 33 divisors (see below), whose sum is σ = 59774640499. Its totient is φ = 26501978520.

The previous prime is 39801447001. The next prime is 39801447029. The reversal of 39801447009 is 90074410893.

The square root of 39801447009 is 199503.

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

It can be written as a sum of positive squares in only one way, i.e., 10867437009 + 28934010000 = 104247^2 + 170100^2 .

It is not a de Polignac number, because 39801447009 - 2³ = 39801447001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39801447001) by changing a digit.

It is a polite number, since it can be written in 32 ways as a sum of consecutive naturals, for example, 48478819 + ... + 48479639.

Almost surely, 2^39801447009 is an apocalyptic number.

39801447009 is the 199503-rd square number.

39801447009 is the 99752-nd centered octagonal number.

It is an amenable number.

39801447009 is a deficient number, since it is larger than the sum of its proper divisors (19973193490).

39801447009 is an frugal number, since it uses more digits than its factorization.

39801447009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 39801447009 in words is "thirty-nine billion, eight hundred one million, four hundred forty-seven thousand, nine".