78427805941 has 2 divisors, whose sum is σ = 78427805942. Its totient is φ = 78427805940.

The previous prime is 78427805903. The next prime is 78427805971. The reversal of 78427805941 is 14950872487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73283904100 + 5143901841 = 270710^2 + 71721^2 .

It is a cyclic number.

It is not a de Polignac number, because 78427805941 - 2²³ = 78419417333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78427805971) 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, 39213902970 + 39213902971.

It is an arithmetic number, because the mean of its divisors is an integer number (39213902971).

Almost surely, 2^78427805941 is an apocalyptic number.

It is an amenable number.

78427805941 is a deficient number, since it is larger than the sum of its proper divisors (1).

78427805941 is an equidigital number, since it uses as much as digits as its factorization.

78427805941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 78427805941 in words is "seventy-eight billion, four hundred twenty-seven million, eight hundred five thousand, nine hundred forty-one".