278684016468 has 48 divisors (see below), whose sum is σ = 763945000896. Its totient is φ = 77953570560.

The previous prime is 278684016451. The next prime is 278684016469. The reversal of 278684016468 is 864610486872.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278684016469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81199921 + ... + 81203352.

It is an arithmetic number, because the mean of its divisors is an integer number (15915520852).

Almost surely, 2^278684016468 is an apocalyptic number.

It is an amenable number.

278684016468 is an abundant number, since it is smaller than the sum of its proper divisors (485260984428).

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

278684016468 is a wasteful number, since it uses less digits than its factorization.

278684016468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162403304 (or 162403302 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 60.

The spelling of 278684016468 in words is "two hundred seventy-eight billion, six hundred eighty-four million, sixteen thousand, four hundred sixty-eight".