78275908433 has 2 divisors, whose sum is σ = 78275908434. Its totient is φ = 78275908432.

The previous prime is 78275908391. The next prime is 78275908481. The reversal of 78275908433 is 33480957287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46022262784 + 32253645649 = 214528^2 + 179593^2 .

It is an emirp because it is prime and its reverse (33480957287) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78275908433 - 2⁸ = 78275908177 is a prime.

It is a super-2 number, since 2×78275908433² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78275908493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39137954216 + 39137954217.

It is an arithmetic number, because the mean of its divisors is an integer number (39137954217).

Almost surely, 2^78275908433 is an apocalyptic number.

It is an amenable number.

78275908433 is a deficient number, since it is larger than the sum of its proper divisors (1).

78275908433 is an equidigital number, since it uses as much as digits as its factorization.

78275908433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 78275908433 in words is "seventy-eight billion, two hundred seventy-five million, nine hundred eight thousand, four hundred thirty-three".