278358367551 has 16 divisors (see below), whose sum is σ = 415827735168. Its totient is φ = 164142525600.

The previous prime is 278358367531. The next prime is 278358367561. The reversal of 278358367551 is 155763853872.

It is not a de Polignac number, because 278358367551 - 2¹⁵ = 278358334783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278358367531) 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, 113986645 + ... + 113989086.

It is an arithmetic number, because the mean of its divisors is an integer number (25989233448).

Almost surely, 2^278358367551 is an apocalyptic number.

278358367551 is a deficient number, since it is larger than the sum of its proper divisors (137469367617).

278358367551 is a wasteful number, since it uses less digits than its factorization.

278358367551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227975782.

The product of its digits is 42336000, while the sum is 60.

The spelling of 278358367551 in words is "two hundred seventy-eight billion, three hundred fifty-eight million, three hundred sixty-seven thousand, five hundred fifty-one".