78073274999 has 4 divisors (see below), whose sum is σ = 78078914160. Its totient is φ = 78067635840.

The previous prime is 78073274977. The next prime is 78073275089. The reversal of 78073274999 is 99947237087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99947237087 = 179 ⋅558364453.

It is a cyclic number.

It is not a de Polignac number, because 78073274999 - 2¹² = 78073270903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78073274969) 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 in 3 ways as a sum of consecutive naturals, for example, 2798762 + ... + 2826519.

It is an arithmetic number, because the mean of its divisors is an integer number (19519728540).

Almost surely, 2^78073274999 is an apocalyptic number.

78073274999 is a deficient number, since it is larger than the sum of its proper divisors (5639161).

78073274999 is a wasteful number, since it uses less digits than its factorization.

78073274999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5639160.

The product of its (nonzero) digits is 48009024, while the sum is 65.

The spelling of 78073274999 in words is "seventy-eight billion, seventy-three million, two hundred seventy-four thousand, nine hundred ninety-nine".