78141444431 has 2 divisors, whose sum is σ = 78141444432. Its totient is φ = 78141444430.

The previous prime is 78141444427. The next prime is 78141444473. The reversal of 78141444431 is 13444414187.

It is a weak prime.

It is an emirp because it is prime and its reverse (13444414187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78141444431 - 2² = 78141444427 is a prime.

It is a super-2 number, since 2×78141444431² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78141444421) 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, 39070722215 + 39070722216.

It is an arithmetic number, because the mean of its divisors is an integer number (39070722216).

Almost surely, 2^78141444431 is an apocalyptic number.

78141444431 is a deficient number, since it is larger than the sum of its proper divisors (1).

78141444431 is an equidigital number, since it uses as much as digits as its factorization.

78141444431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172032, while the sum is 41.

The spelling of 78141444431 in words is "seventy-eight billion, one hundred forty-one million, four hundred forty-four thousand, four hundred thirty-one".