39980686378 has 8 divisors (see below), whose sum is σ = 59972022468. Its totient is φ = 19990012224.

The previous prime is 39980686373. The next prime is 39980686379. The reversal of 39980686378 is 87368608993.

It can be written as a sum of positive squares in 2 ways, for example, as 33235842249 + 6744844129 = 182307^2 + 82127^2 .

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

It is not an unprimeable number, because it can be changed into a prime (39980686373) 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, 33250 + ... + 284722.

Almost surely, 2^39980686378 is an apocalyptic number.

39980686378 is a deficient number, since it is larger than the sum of its proper divisors (19991336090).

39980686378 is a wasteful number, since it uses less digits than its factorization.

39980686378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330968.

The product of its (nonzero) digits is 94058496, while the sum is 67.

The spelling of 39980686378 in words is "thirty-nine billion, nine hundred eighty million, six hundred eighty-six thousand, three hundred seventy-eight".