78206881733 has 2 divisors, whose sum is σ = 78206881734. Its totient is φ = 78206881732.

The previous prime is 78206881693. The next prime is 78206881741. The reversal of 78206881733 is 33718860287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44828322529 + 33378559204 = 211727^2 + 182698^2 .

It is a cyclic number.

It is not a de Polignac number, because 78206881733 - 2⁸ = 78206881477 is a prime.

It is a super-2 number, since 2×78206881733² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78206886733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39103440866 + 39103440867.

It is an arithmetic number, because the mean of its divisors is an integer number (39103440867).

Almost surely, 2^78206881733 is an apocalyptic number.

It is an amenable number.

78206881733 is a deficient number, since it is larger than the sum of its proper divisors (1).

78206881733 is an equidigital number, since it uses as much as digits as its factorization.

78206881733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 78206881733 in words is "seventy-eight billion, two hundred six million, eight hundred eighty-one thousand, seven hundred thirty-three".