3988340323651 has 4 divisors (see below), whose sum is σ = 3988346151312. Its totient is φ = 3988334495992.

The previous prime is 3988340323631. The next prime is 3988340323679. The reversal of 3988340323651 is 1563230438893.

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

It is a cyclic number.

It is not a de Polignac number, because 3988340323651 - 2⁹ = 3988340323139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3988340323592 and 3988340323601.

It is not an unprimeable number, because it can be changed into a prime (3988340323631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1725796 + ... + 3309841.

It is an arithmetic number, because the mean of its divisors is an integer number (997086537828).

Almost surely, 2^{3988340323651} is an apocalyptic number.

3988340323651 is a deficient number, since it is larger than the sum of its proper divisors (5827661).

3988340323651 is an equidigital number, since it uses as much as digits as its factorization.

3988340323651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5827660.

The product of its (nonzero) digits is 11197440, while the sum is 55.

The spelling of 3988340323651 in words is "three trillion, nine hundred eighty-eight billion, three hundred forty million, three hundred twenty-three thousand, six hundred fifty-one".