6851600381 has 2 divisors, whose sum is σ = 6851600382. Its totient is φ = 6851600380.

The previous prime is 6851600351. The next prime is 6851600429. The reversal of 6851600381 is 1830061586.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6248112025 + 603488356 = 79045^2 + 24566^2 .

It is a cyclic number.

It is not a de Polignac number, because 6851600381 - 2¹⁴ = 6851583997 is a prime.

It is a super-3 number, since 3×6851600381³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6851600351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3425800190 + 3425800191.

It is an arithmetic number, because the mean of its divisors is an integer number (3425800191).

Almost surely, 2^6851600381 is an apocalyptic number.

It is an amenable number.

6851600381 is a deficient number, since it is larger than the sum of its proper divisors (1).

6851600381 is an equidigital number, since it uses as much as digits as its factorization.

6851600381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 6851600381 is about 82774.3944767946. The cubic root of 6851600381 is about 1899.3165021657.

The spelling of 6851600381 in words is "six billion, eight hundred fifty-one million, six hundred thousand, three hundred eighty-one".