3981315310946 has 4 divisors (see below), whose sum is σ = 5971972966422. Its totient is φ = 1990657655472.

The previous prime is 3981315310937. The next prime is 3981315310993. The reversal of 3981315310946 is 6490135131893.

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., 3893498508025 + 87816802921 = 1973195^2 + 296339^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995328827735 + ... + 995328827738.

Almost surely, 2^{3981315310946} is an apocalyptic number.

3981315310946 is a deficient number, since it is larger than the sum of its proper divisors (1990657655476).

3981315310946 is a wasteful number, since it uses less digits than its factorization.

3981315310946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990657655475.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 3981315310946 in words is "three trillion, nine hundred eighty-one billion, three hundred fifteen million, three hundred ten thousand, nine hundred forty-six".