78257213563 has 2 divisors, whose sum is σ = 78257213564. Its totient is φ = 78257213562.

The previous prime is 78257213561. The next prime is 78257213611. The reversal of 78257213563 is 36531275287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78257213563 - 2¹ = 78257213561 is a prime.

It is a super-2 number, since 2×78257213563² (a number of 23 digits) contains 22 as substring.

Together with 78257213561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78257213561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39128606781 + 39128606782.

It is an arithmetic number, because the mean of its divisors is an integer number (39128606782).

Almost surely, 2^78257213563 is an apocalyptic number.

78257213563 is a deficient number, since it is larger than the sum of its proper divisors (1).

78257213563 is an equidigital number, since it uses as much as digits as its factorization.

78257213563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800, while the sum is 49.

The spelling of 78257213563 in words is "seventy-eight billion, two hundred fifty-seven million, two hundred thirteen thousand, five hundred sixty-three".