3988266994431 has 6 divisors (see below), whose sum is σ = 5760830103080. Its totient is φ = 2658844662948.

The previous prime is 3988266994421. The next prime is 3988266994447. The reversal of 3988266994431 is 1344996628893.

3988266994431 is a `hidden beast` number, since 3 + 9 + 88 + 26 + 6 + 9 + 94 + 431 = 666.

It is not a de Polignac number, because 3988266994431 - 2⁷ = 3988266994303 is a prime.

It is a super-2 number, since 2×3988266994431² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3988266994431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988266994421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221570388571 + ... + 221570388588.

Almost surely, 2^{3988266994431} is an apocalyptic number.

3988266994431 is a deficient number, since it is larger than the sum of its proper divisors (1772563108649).

3988266994431 is a wasteful number, since it uses less digits than its factorization.

3988266994431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443140777165 (or 443140777162 counting only the distinct ones).

The product of its digits is 483729408, while the sum is 72.

The spelling of 3988266994431 in words is "three trillion, nine hundred eighty-eight billion, two hundred sixty-six million, nine hundred ninety-four thousand, four hundred thirty-one".