78780063899 has 4 divisors (see below), whose sum is σ = 78780826536. Its totient is φ = 78779301264.

The previous prime is 78780063839. The next prime is 78780063911. The reversal of 78780063899 is 99836008787.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78780063899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78780063829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196514 + ... + 442919.

It is an arithmetic number, because the mean of its divisors is an integer number (19695206634).

Almost surely, 2^78780063899 is an apocalyptic number.

78780063899 is a deficient number, since it is larger than the sum of its proper divisors (762637).

78780063899 is a wasteful number, since it uses less digits than its factorization.

78780063899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762636.

The product of its (nonzero) digits is 36578304, while the sum is 65.

The spelling of 78780063899 in words is "seventy-eight billion, seven hundred eighty million, sixty-three thousand, eight hundred ninety-nine".