78228957133 has 2 divisors, whose sum is σ = 78228957134. Its totient is φ = 78228957132.

The previous prime is 78228957119. The next prime is 78228957179. The reversal of 78228957133 is 33175982287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78093979209 + 134977924 = 279453^2 + 11618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78228957133 is a prime.

It is a super-2 number, since 2×78228957133² (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 (78228957113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39114478566 + 39114478567.

It is an arithmetic number, because the mean of its divisors is an integer number (39114478567).

Almost surely, 2^78228957133 is an apocalyptic number.

It is an amenable number.

78228957133 is a deficient number, since it is larger than the sum of its proper divisors (1).

78228957133 is an equidigital number, since it uses as much as digits as its factorization.

78228957133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 55.

The spelling of 78228957133 in words is "seventy-eight billion, two hundred twenty-eight million, nine hundred fifty-seven thousand, one hundred thirty-three".