3981501998717 has 4 divisors (see below), whose sum is σ = 4029471902400. Its totient is φ = 3933532095036.

The previous prime is 3981501998711. The next prime is 3981501998729. The reversal of 3981501998717 is 7178991051893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3981501998717 - 2²⁴ = 3981485221501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981501998711) 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, 23984951717 + ... + 23984951882.

It is an arithmetic number, because the mean of its divisors is an integer number (1007367975600).

Almost surely, 2^{3981501998717} is an apocalyptic number.

It is an amenable number.

3981501998717 is a deficient number, since it is larger than the sum of its proper divisors (47969903683).

3981501998717 is an equidigital number, since it uses as much as digits as its factorization.

3981501998717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47969903682.

The product of its (nonzero) digits is 34292160, while the sum is 68.

The spelling of 3981501998717 in words is "three trillion, nine hundred eighty-one billion, five hundred one million, nine hundred ninety-eight thousand, seven hundred seventeen".