3947535845768 has 8 divisors (see below), whose sum is σ = 7401629710830. Its totient is φ = 1973767922880.

The previous prime is 3947535845761. The next prime is 3947535845791. The reversal of 3947535845768 is 8675485357493.

3947535845768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2215042843204 + 1732493002564 = 1488302^2 + 1316242^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 3947535845695 and 3947535845704.

It is not an unprimeable number, because it can be changed into a prime (3947535845761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246720990353 + ... + 246720990368.

Almost surely, 2^{3947535845768} is an apocalyptic number.

It is an amenable number.

3947535845768 is a deficient number, since it is larger than the sum of its proper divisors (3454093865062).

3947535845768 is a wasteful number, since it uses less digits than its factorization.

3947535845768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493441980727 (or 493441980723 counting only the distinct ones).

The product of its digits is 3048192000, while the sum is 74.

The spelling of 3947535845768 in words is "three trillion, nine hundred forty-seven billion, five hundred thirty-five million, eight hundred forty-five thousand, seven hundred sixty-eight".