39680845865 has 8 divisors (see below), whose sum is σ = 48515449608. Its totient is φ = 31145720320.

The previous prime is 39680845861. The next prime is 39680845871. The reversal of 39680845865 is 56854808693.

It can be written as a sum of positive squares in 4 ways, for example, as 16714352656 + 22966493209 = 129284^2 + 151547^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39680845865 - 2² = 39680845861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39680845798 and 39680845807.

It is not an unprimeable number, because it can be changed into a prime (39680845861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74869256 + ... + 74869785.

It is an arithmetic number, because the mean of its divisors is an integer number (6064431201).

Almost surely, 2^39680845865 is an apocalyptic number.

It is an amenable number.

39680845865 is a deficient number, since it is larger than the sum of its proper divisors (8834603743).

39680845865 is a wasteful number, since it uses less digits than its factorization.

39680845865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149739099.

The product of its (nonzero) digits is 49766400, while the sum is 62.

The spelling of 39680845865 in words is "thirty-nine billion, six hundred eighty million, eight hundred forty-five thousand, eight hundred sixty-five".