78807533533 has 2 divisors, whose sum is σ = 78807533534. Its totient is φ = 78807533532.

The previous prime is 78807533507. The next prime is 78807533549. The reversal of 78807533533 is 33533570887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46191895929 + 32615637604 = 214923^2 + 180598^2 .

It is a cyclic number.

It is not a de Polignac number, because 78807533533 - 2⁵ = 78807533501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78807333533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39403766766 + 39403766767.

It is an arithmetic number, because the mean of its divisors is an integer number (39403766767).

Almost surely, 2^78807533533 is an apocalyptic number.

It is an amenable number.

78807533533 is a deficient number, since it is larger than the sum of its proper divisors (1).

78807533533 is an equidigital number, since it uses as much as digits as its factorization.

78807533533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6350400, while the sum is 52.

The spelling of 78807533533 in words is "seventy-eight billion, eight hundred seven million, five hundred thirty-three thousand, five hundred thirty-three".