78203656778334 has 8 divisors (see below), whose sum is σ = 156407313556680. Its totient is φ = 26067885592776.

The previous prime is 78203656778333. The next prime is 78203656778341. The reversal of 78203656778334 is 43387765630287.

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

78203656778334 is an admirable number.

It is a super-2 number, since 2×78203656778334² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78203656778333) 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, 6516971398189 + ... + 6516971398200.

It is an arithmetic number, because the mean of its divisors is an integer number (19550914194585).

Almost surely, 2^{78203656778334} is an apocalyptic number.

78203656778334 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78203656778334 is a wasteful number, since it uses less digits than its factorization.

78203656778334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13033942796394.

The product of its (nonzero) digits is 853493760, while the sum is 69.

The spelling of 78203656778334 in words is "seventy-eight trillion, two hundred three billion, six hundred fifty-six million, seven hundred seventy-eight thousand, three hundred thirty-four".