3861997751 has 8 divisors (see below), whose sum is σ = 3944619600. Its totient is φ = 3779948160.

The previous prime is 3861997739. The next prime is 3861997757. The reversal of 3861997751 is 1577991683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3861997751 - 2¹⁰ = 3861996727 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 (3861997757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129410 + ... + 156431.

It is an arithmetic number, because the mean of its divisors is an integer number (493077450).

Almost surely, 2^3861997751 is an apocalyptic number.

3861997751 is a deficient number, since it is larger than the sum of its proper divisors (82621849).

3861997751 is a wasteful number, since it uses less digits than its factorization.

3861997751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286129.

The product of its digits is 2857680, while the sum is 56.

The square root of 3861997751 is about 62144.9736583740. The cubic root of 3861997751 is about 1568.9315828476.

The spelling of 3861997751 in words is "three billion, eight hundred sixty-one million, nine hundred ninety-seven thousand, seven hundred fifty-one".