78310457287 has 2 divisors, whose sum is σ = 78310457288. Its totient is φ = 78310457286.

The previous prime is 78310457261. The next prime is 78310457317. The reversal of 78310457287 is 78275401387.

It is a weak prime.

It is an emirp because it is prime and its reverse (78275401387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78310457287 - 2¹⁵ = 78310424519 is a prime.

It is a super-2 number, since 2×78310457287² (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 (78310157287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39155228643 + 39155228644.

It is an arithmetic number, because the mean of its divisors is an integer number (39155228644).

Almost surely, 2^78310457287 is an apocalyptic number.

78310457287 is a deficient number, since it is larger than the sum of its proper divisors (1).

78310457287 is an equidigital number, since it uses as much as digits as its factorization.

78310457287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2634240, while the sum is 52.

The spelling of 78310457287 in words is "seventy-eight billion, three hundred ten million, four hundred fifty-seven thousand, two hundred eighty-seven".