78878621335338 has 48 divisors (see below), whose sum is σ = 186440969175552. Its totient is φ = 23902536696000.

The previous prime is 78878621335291. The next prime is 78878621335403. The reversal of 78878621335338 is 83353312687887.

78878621335338 is a `hidden beast` number, since 7 + 8 + 8 + 7 + 86 + 2 + 1 + 3 + 3 + 533 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118714423 + ... + 119377013.

It is an arithmetic number, because the mean of its divisors is an integer number (3884186857824).

Almost surely, 2^{78878621335338} is an apocalyptic number.

78878621335338 is an abundant number, since it is smaller than the sum of its proper divisors (107562347840214).

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

78878621335338 is a wasteful number, since it uses less digits than its factorization.

78878621335338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263851 (or 1263848 counting only the distinct ones).

The product of its digits is 975421440, while the sum is 72.

The spelling of 78878621335338 in words is "seventy-eight trillion, eight hundred seventy-eight billion, six hundred twenty-one million, three hundred thirty-five thousand, three hundred thirty-eight".