78795459881 has 2 divisors, whose sum is σ = 78795459882. Its totient is φ = 78795459880.

The previous prime is 78795459773. The next prime is 78795459889. The reversal of 78795459881 is 18895459787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52296829225 + 26498630656 = 228685^2 + 162784^2 .

It is an emirp because it is prime and its reverse (18895459787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78795459881 - 2³⁴ = 61615590697 is a prime.

It is a super-2 number, since 2×78795459881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78795459889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39397729940 + 39397729941.

It is an arithmetic number, because the mean of its divisors is an integer number (39397729941).

Almost surely, 2^78795459881 is an apocalyptic number.

It is an amenable number.

78795459881 is a deficient number, since it is larger than the sum of its proper divisors (1).

78795459881 is an equidigital number, since it uses as much as digits as its factorization.

78795459881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 203212800, while the sum is 71.

The spelling of 78795459881 in words is "seventy-eight billion, seven hundred ninety-five million, four hundred fifty-nine thousand, eight hundred eighty-one".