78535253579 has 2 divisors, whose sum is σ = 78535253580. Its totient is φ = 78535253578.

The previous prime is 78535253491. The next prime is 78535253603. The reversal of 78535253579 is 97535253587.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78535253579 - 2²⁴ = 78518476363 is a prime.

It is not a weakly prime, because it can be changed into another prime (78535258579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39267626789 + 39267626790.

It is an arithmetic number, because the mean of its divisors is an integer number (39267626790).

Almost surely, 2^78535253579 is an apocalyptic number.

78535253579 is a deficient number, since it is larger than the sum of its proper divisors (1).

78535253579 is an equidigital number, since it uses as much as digits as its factorization.

78535253579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39690000, while the sum is 59.

The spelling of 78535253579 in words is "seventy-eight billion, five hundred thirty-five million, two hundred fifty-three thousand, five hundred seventy-nine".