3871649851 has 8 divisors (see below), whose sum is σ = 3883832064. Its totient is φ = 3859486440.

The previous prime is 3871649833. The next prime is 3871649857. The reversal of 3871649851 is 1589461783.

3871649851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3871649851 - 2⁷ = 3871649723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3871649857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484450 + ... + 492376.

It is an arithmetic number, because the mean of its divisors is an integer number (485479008).

Almost surely, 2^3871649851 is an apocalyptic number.

3871649851 is a deficient number, since it is larger than the sum of its proper divisors (12182213).

3871649851 is an equidigital number, since it uses as much as digits as its factorization.

3871649851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9401.

The product of its digits is 1451520, while the sum is 52.

The square root of 3871649851 is about 62222.5831270287. The cubic root of 3871649851 is about 1570.2375465143.

The spelling of 3871649851 in words is "three billion, eight hundred seventy-one million, six hundred forty-nine thousand, eight hundred fifty-one".