78275908499 has 2 divisors, whose sum is σ = 78275908500. Its totient is φ = 78275908498.

The previous prime is 78275908493. The next prime is 78275908573. The reversal of 78275908499 is 99480957287.

It is a weak prime.

It is an emirp because it is prime and its reverse (99480957287) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78275908499 - 2¹² = 78275904403 is a prime.

It is a super-2 number, since 2×78275908499² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78275908493) 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, 39137954249 + 39137954250.

It is an arithmetic number, because the mean of its divisors is an integer number (39137954250).

Almost surely, 2^78275908499 is an apocalyptic number.

78275908499 is a deficient number, since it is larger than the sum of its proper divisors (1).

78275908499 is an equidigital number, since it uses as much as digits as its factorization.

78275908499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91445760, while the sum is 68.

The spelling of 78275908499 in words is "seventy-eight billion, two hundred seventy-five million, nine hundred eight thousand, four hundred ninety-nine".