8309439989745 has 32 divisors (see below), whose sum is σ = 13493526694272. Its totient is φ = 4365707254272.

The previous prime is 8309439989717. The next prime is 8309439989759. The reversal of 8309439989745 is 5479899349038.

It is not a de Polignac number, because 8309439989745 - 2¹¹ = 8309439987697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3682422 + ... + 5493551.

It is an arithmetic number, because the mean of its divisors is an integer number (421672709196).

Almost surely, 2^{8309439989745} is an apocalyptic number.

It is an amenable number.

8309439989745 is a deficient number, since it is larger than the sum of its proper divisors (5184086704527).

8309439989745 is a wasteful number, since it uses less digits than its factorization.

8309439989745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9176881.

The product of its (nonzero) digits is 2116316160, while the sum is 78.

The spelling of 8309439989745 in words is "eight trillion, three hundred nine billion, four hundred thirty-nine million, nine hundred eighty-nine thousand, seven hundred forty-five".