78380400563 has 2 divisors, whose sum is σ = 78380400564. Its totient is φ = 78380400562.

The previous prime is 78380400533. The next prime is 78380400601. The reversal of 78380400563 is 36500408387.

It is a weak prime.

It is an emirp because it is prime and its reverse (36500408387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78380400563 - 2¹⁴ = 78380384179 is a prime.

It is a super-2 number, since 2×78380400563² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78380400533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39190200281 + 39190200282.

It is an arithmetic number, because the mean of its divisors is an integer number (39190200282).

Almost surely, 2^78380400563 is an apocalyptic number.

78380400563 is a deficient number, since it is larger than the sum of its proper divisors (1).

78380400563 is an equidigital number, since it uses as much as digits as its factorization.

78380400563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 78380400563 in words is "seventy-eight billion, three hundred eighty million, four hundred thousand, five hundred sixty-three".