78278939780948 has 24 divisors (see below), whose sum is σ = 141407604979200. Its totient is φ = 37876775643360.

The previous prime is 78278939780911. The next prime is 78278939780957. The reversal of 78278939780948 is 84908793987287.

It is a super-2 number, since 2×78278939780948² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41760353 + ... + 43594551.

It is an arithmetic number, because the mean of its divisors is an integer number (5891983540800).

Almost surely, 2^{78278939780948} is an apocalyptic number.

It is an amenable number.

78278939780948 is a deficient number, since it is larger than the sum of its proper divisors (63128665198252).

78278939780948 is a wasteful number, since it uses less digits than its factorization.

78278939780948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178407 (or 2178405 counting only the distinct ones).

The product of its (nonzero) digits is 24580620288, while the sum is 89.

The spelling of 78278939780948 in words is "seventy-eight trillion, two hundred seventy-eight billion, nine hundred thirty-nine million, seven hundred eighty thousand, nine hundred forty-eight".