78295925881 has 2 divisors, whose sum is σ = 78295925882. Its totient is φ = 78295925880.

The previous prime is 78295925797. The next prime is 78295925921. The reversal of 78295925881 is 18852959287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48096437481 + 30199488400 = 219309^2 + 173780^2 .

It is a cyclic number.

It is not a de Polignac number, because 78295925881 - 2⁷ = 78295925753 is a prime.

It is a super-2 number, since 2×78295925881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78295925381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39147962940 + 39147962941.

It is an arithmetic number, because the mean of its divisors is an integer number (39147962941).

Almost surely, 2^78295925881 is an apocalyptic number.

It is an amenable number.

78295925881 is a deficient number, since it is larger than the sum of its proper divisors (1).

78295925881 is an equidigital number, since it uses as much as digits as its factorization.

78295925881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29030400, while the sum is 64.

The spelling of 78295925881 in words is "seventy-eight billion, two hundred ninety-five million, nine hundred twenty-five thousand, eight hundred eighty-one".