78353271229 has 2 divisors, whose sum is σ = 78353271230. Its totient is φ = 78353271228.

The previous prime is 78353271209. The next prime is 78353271247. The reversal of 78353271229 is 92217235387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65883082329 + 12470188900 = 256677^2 + 111670^2 .

It is a cyclic number.

It is not a de Polignac number, because 78353271229 - 2⁵ = 78353271197 is a prime.

It is a super-2 number, since 2×78353271229² (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 (78353271209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39176635614 + 39176635615.

It is an arithmetic number, because the mean of its divisors is an integer number (39176635615).

Almost surely, 2^78353271229 is an apocalyptic number.

It is an amenable number.

78353271229 is a deficient number, since it is larger than the sum of its proper divisors (1).

78353271229 is an equidigital number, since it uses as much as digits as its factorization.

78353271229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The spelling of 78353271229 in words is "seventy-eight billion, three hundred fifty-three million, two hundred seventy-one thousand, two hundred twenty-nine".