78174455043278 has 32 divisors (see below), whose sum is σ = 128296449815040. Its totient is φ = 35429802876160.

The previous prime is 78174455043227. The next prime is 78174455043283. The reversal of 78174455043278 is 87234055447187.

It is a super-2 number, since 2×78174455043278² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81899453 + ... + 82848471.

It is an arithmetic number, because the mean of its divisors is an integer number (4009264056720).

Almost surely, 2^{78174455043278} is an apocalyptic number.

78174455043278 is a deficient number, since it is larger than the sum of its proper divisors (50121994771762).

78174455043278 is a wasteful number, since it uses less digits than its factorization.

78174455043278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959992.

The product of its (nonzero) digits is 210739200, while the sum is 65.

The spelling of 78174455043278 in words is "seventy-eight trillion, one hundred seventy-four billion, four hundred fifty-five million, forty-three thousand, two hundred seventy-eight".