78319974725079 has 8 divisors (see below), whose sum is σ = 104434573604352. Its totient is φ = 52209346164600.

The previous prime is 78319974725077. The next prime is 78319974725089. The reversal of 78319974725079 is 97052747991387.

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

It is not a de Polignac number, because 78319974725079 - 2¹ = 78319974725077 is a prime.

It is a super-2 number, since 2×78319974725079² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78319974724995 and 78319974725013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78319974725077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992533669 + ... + 992612574.

It is an arithmetic number, because the mean of its divisors is an integer number (13054321700544).

Almost surely, 2^{78319974725079} is an apocalyptic number.

78319974725079 is a deficient number, since it is larger than the sum of its proper divisors (26114598879273).

78319974725079 is a wasteful number, since it uses less digits than its factorization.

78319974725079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985159397.

The product of its (nonzero) digits is 1680315840, while the sum is 78.

The spelling of 78319974725079 in words is "seventy-eight trillion, three hundred nineteen billion, nine hundred seventy-four million, seven hundred twenty-five thousand, seventy-nine".