79893703978 has 8 divisors (see below), whose sum is σ = 130735152000. Its totient is φ = 36315319980.

The previous prime is 79893703943. The next prime is 79893703979. The reversal of 79893703978 is 87930739897.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (79893703979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1815765978 + ... + 1815766021.

It is an arithmetic number, because the mean of its divisors is an integer number (16341894000).

Almost surely, 2^79893703978 is an apocalyptic number.

79893703978 is a deficient number, since it is larger than the sum of its proper divisors (50841448022).

79893703978 is a wasteful number, since it uses less digits than its factorization.

79893703978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3631532012.

The product of its (nonzero) digits is 144027072, while the sum is 70.

The spelling of 79893703978 in words is "seventy-nine billion, eight hundred ninety-three million, seven hundred three thousand, nine hundred seventy-eight".