7868751533 has 2 divisors, whose sum is σ = 7868751534. Its totient is φ = 7868751532.

The previous prime is 7868751521. The next prime is 7868751581. The reversal of 7868751533 is 3351578687.

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., 6776911684 + 1091839849 = 82322^2 + 33043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7868751533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7868721533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3934375766 + 3934375767.

It is an arithmetic number, because the mean of its divisors is an integer number (3934375767).

Almost surely, 2^7868751533 is an apocalyptic number.

It is an amenable number.

7868751533 is a deficient number, since it is larger than the sum of its proper divisors (1).

7868751533 is an equidigital number, since it uses as much as digits as its factorization.

7868751533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600, while the sum is 53.

The square root of 7868751533 is about 88705.9836369565. The cubic root of 7868751533 is about 1989.0022634941.

The spelling of 7868751533 in words is "seven billion, eight hundred sixty-eight million, seven hundred fifty-one thousand, five hundred thirty-three".