278231678679 has 16 divisors (see below), whose sum is σ = 371396861312. Its totient is φ = 185277220128.

The previous prime is 278231678633. The next prime is 278231678701. The reversal of 278231678679 is 976876132872.

It is a happy number.

It is not a de Polignac number, because 278231678679 - 2⁷ = 278231678551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278231678779) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 25318224 + ... + 25329210.

It is an arithmetic number, because the mean of its divisors is an integer number (23212303832).

Almost surely, 2^278231678679 is an apocalyptic number.

278231678679 is a deficient number, since it is larger than the sum of its proper divisors (93165182633).

278231678679 is a wasteful number, since it uses less digits than its factorization.

278231678679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19806.

The product of its digits is 85349376, while the sum is 66.

The spelling of 278231678679 in words is "two hundred seventy-eight billion, two hundred thirty-one million, six hundred seventy-eight thousand, six hundred seventy-nine".