79709598478 has 4 divisors (see below), whose sum is σ = 119564397720. Its totient is φ = 39854799238.

The previous prime is 79709598443. The next prime is 79709598503. The reversal of 79709598478 is 87489590797.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×79709598478³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79709598478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19927399618 + ... + 19927399621.

It is an arithmetic number, because the mean of its divisors is an integer number (29891099430).

Almost surely, 2^79709598478 is an apocalyptic number.

79709598478 is a deficient number, since it is larger than the sum of its proper divisors (39854799242).

79709598478 is a wasteful number, since it uses less digits than its factorization.

79709598478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39854799241.

The product of its (nonzero) digits is 320060160, while the sum is 73.

The spelling of 79709598478 in words is "seventy-nine billion, seven hundred nine million, five hundred ninety-eight thousand, four hundred seventy-eight".