78272427287 has 2 divisors, whose sum is σ = 78272427288. Its totient is φ = 78272427286.

The previous prime is 78272427283. The next prime is 78272427329.

It is a happy number.

78272427287 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 78272427287 - 2² = 78272427283 is a prime.

It is a super-2 number, since 2×78272427287² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78272427283) 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, 39136213643 + 39136213644.

It is an arithmetic number, because the mean of its divisors is an integer number (39136213644).

Almost surely, 2^78272427287 is an apocalyptic number.

78272427287 is a deficient number, since it is larger than the sum of its proper divisors (1).

78272427287 is an equidigital number, since it uses as much as digits as its factorization.

78272427287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9834496, while the sum is 56.

The spelling of 78272427287 in words is "seventy-eight billion, two hundred seventy-two million, four hundred twenty-seven thousand, two hundred eighty-seven".