7838475851 has 2 divisors, whose sum is σ = 7838475852. Its totient is φ = 7838475850.

The previous prime is 7838475839. The next prime is 7838475893. The reversal of 7838475851 is 1585748387.

7838475851 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7838475851 is a prime.

It is a super-2 number, since 2×7838475851² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7838475751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3919237925 + 3919237926.

It is an arithmetic number, because the mean of its divisors is an integer number (3919237926).

Almost surely, 2^7838475851 is an apocalyptic number.

7838475851 is a deficient number, since it is larger than the sum of its proper divisors (1).

7838475851 is an equidigital number, since it uses as much as digits as its factorization.

7838475851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7526400, while the sum is 56.

The square root of 7838475851 is about 88535.1673122043. The cubic root of 7838475851 is about 1986.4480337637.

The spelling of 7838475851 in words is "seven billion, eight hundred thirty-eight million, four hundred seventy-five thousand, eight hundred fifty-one".