7081868257 has 2 divisors, whose sum is σ = 7081868258. Its totient is φ = 7081868256.

The previous prime is 7081868251. The next prime is 7081868267. The reversal of 7081868257 is 7528681807.

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., 5447768481 + 1634099776 = 73809^2 + 40424^2 .

It is a cyclic number.

It is not a de Polignac number, because 7081868257 - 2¹⁵ = 7081835489 is a prime.

It is not a weakly prime, because it can be changed into another prime (7081868251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3540934128 + 3540934129.

It is an arithmetic number, because the mean of its divisors is an integer number (3540934129).

Almost surely, 2^7081868257 is an apocalyptic number.

It is an amenable number.

7081868257 is a deficient number, since it is larger than the sum of its proper divisors (1).

7081868257 is an equidigital number, since it uses as much as digits as its factorization.

7081868257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1505280, while the sum is 52.

The square root of 7081868257 is about 84153.8368525167. The cubic root of 7081868257 is about 1920.3598371611.

The spelling of 7081868257 in words is "seven billion, eighty-one million, eight hundred sixty-eight thousand, two hundred fifty-seven".