39536392745978 has 4 divisors (see below), whose sum is σ = 59304589118970. Its totient is φ = 19768196372988.

The previous prime is 39536392745947. The next prime is 39536392745987. The reversal of 39536392745978 is 87954729363593.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 37812746728849 + 1723646017129 = 6149207^2 + 1312877^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9884098186493 + ... + 9884098186496.

Almost surely, 2^{39536392745978} is an apocalyptic number.

39536392745978 is a deficient number, since it is larger than the sum of its proper divisors (19768196372992).

39536392745978 is a wasteful number, since it uses less digits than its factorization.

39536392745978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19768196372991.

The product of its digits is 9258883200, while the sum is 80.

The spelling of 39536392745978 in words is "thirty-nine trillion, five hundred thirty-six billion, three hundred ninety-two million, seven hundred forty-five thousand, nine hundred seventy-eight".