78174420158479 has 8 divisors (see below), whose sum is σ = 78181644832560. Its totient is φ = 78167195806656.

The previous prime is 78174420158441. The next prime is 78174420158507. The reversal of 78174420158479 is 97485102447187.

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 78174420158479 - 2¹¹ = 78174420156431 is a prime.

It is a super-2 number, since 2×78174420158479² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78174427158479) 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, 854048787 + ... + 854140315.

It is an arithmetic number, because the mean of its divisors is an integer number (9772705604070).

Almost surely, 2^{78174420158479} is an apocalyptic number.

78174420158479 is a deficient number, since it is larger than the sum of its proper divisors (7224674081).

78174420158479 is a wasteful number, since it uses less digits than its factorization.

78174420158479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161129.

The product of its (nonzero) digits is 126443520, while the sum is 67.

The spelling of 78174420158479 in words is "seventy-eight trillion, one hundred seventy-four billion, four hundred twenty million, one hundred fifty-eight thousand, four hundred seventy-nine".