78978694763 has 8 divisors (see below), whose sum is σ = 80298394320. Its totient is φ = 77663139840.

The previous prime is 78978694759. The next prime is 78978694783. The reversal of 78978694763 is 36749687987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78978694763 - 2² = 78978694759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78978694723) 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 in 7 ways as a sum of consecutive naturals, for example, 997718 + ... + 1073963.

It is an arithmetic number, because the mean of its divisors is an integer number (10037299290).

Almost surely, 2^78978694763 is an apocalyptic number.

78978694763 is a deficient number, since it is larger than the sum of its proper divisors (1319699557).

78978694763 is a wasteful number, since it uses less digits than its factorization.

78978694763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072317.

The product of its digits is 768144384, while the sum is 74.

The spelling of 78978694763 in words is "seventy-eight billion, nine hundred seventy-eight million, six hundred ninety-four thousand, seven hundred sixty-three".