3990775813448 has 12 divisors (see below), whose sum is σ = 7482715244595. Its totient is φ = 1995385081560.

The previous prime is 3990775813439. The next prime is 3990775813469. The reversal of 3990775813448 is 8443185770993.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 1995387906724 + 1995387906724 = 1412582^2 + 1412582^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1412582.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5297183 + ... + 6003473.

Almost surely, 2^{3990775813448} is an apocalyptic number.

It is an amenable number.

3990775813448 is a deficient number, since it is larger than the sum of its proper divisors (3491939431147).

3990775813448 is an frugal number, since it uses more digits than its factorization.

3990775813448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412588 (or 706293 counting only the distinct ones).

The product of its (nonzero) digits is 182891520, while the sum is 68.

The spelling of 3990775813448 in words is "three trillion, nine hundred ninety billion, seven hundred seventy-five million, eight hundred thirteen thousand, four hundred forty-eight".