78255445627 has 2 divisors, whose sum is σ = 78255445628. Its totient is φ = 78255445626.

The previous prime is 78255445621. The next prime is 78255445633. The reversal of 78255445627 is 72654455287.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (78255445621) and next prime (78255445633).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78255445627 is a prime.

It is a super-2 number, since 2×78255445627² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78255445621) 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, 39127722813 + 39127722814.

It is an arithmetic number, because the mean of its divisors is an integer number (39127722814).

Almost surely, 2^78255445627 is an apocalyptic number.

78255445627 is a deficient number, since it is larger than the sum of its proper divisors (1).

78255445627 is an equidigital number, since it uses as much as digits as its factorization.

78255445627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816000, while the sum is 55.

The spelling of 78255445627 in words is "seventy-eight billion, two hundred fifty-five million, four hundred forty-five thousand, six hundred twenty-seven".