78285619487 has 2 divisors, whose sum is σ = 78285619488. Its totient is φ = 78285619486.

The previous prime is 78285619397. The next prime is 78285619507. The reversal of 78285619487 is 78491658287.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78285619487 - 2¹⁸ = 78285357343 is a prime.

It is a super-2 number, since 2×78285619487² (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 (78285649487) 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, 39142809743 + 39142809744.

It is an arithmetic number, because the mean of its divisors is an integer number (39142809744).

Almost surely, 2^78285619487 is an apocalyptic number.

78285619487 is a deficient number, since it is larger than the sum of its proper divisors (1).

78285619487 is an equidigital number, since it uses as much as digits as its factorization.

78285619487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54190080, while the sum is 65.

The spelling of 78285619487 in words is "seventy-eight billion, two hundred eighty-five million, six hundred nineteen thousand, four hundred eighty-seven".