78259194253 has 2 divisors, whose sum is σ = 78259194254. Its totient is φ = 78259194252.

The previous prime is 78259194179. The next prime is 78259194281. The reversal of 78259194253 is 35249195287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74246985289 + 4012208964 = 272483^2 + 63342^2 .

It is a cyclic number.

It is not a de Polignac number, because 78259194253 - 2⁹ = 78259193741 is a prime.

It is a super-2 number, since 2×78259194253² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78259194194 and 78259194203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78259194053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39129597126 + 39129597127.

It is an arithmetic number, because the mean of its divisors is an integer number (39129597127).

Almost surely, 2^78259194253 is an apocalyptic number.

It is an amenable number.

78259194253 is a deficient number, since it is larger than the sum of its proper divisors (1).

78259194253 is an equidigital number, since it uses as much as digits as its factorization.

78259194253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 55.

The spelling of 78259194253 in words is "seventy-eight billion, two hundred fifty-nine million, one hundred ninety-four thousand, two hundred fifty-three".