278916360961 has 8 divisors (see below), whose sum is σ = 318770964864. Its totient is φ = 239064109440.

The previous prime is 278916360953. The next prime is 278916361051. The reversal of 278916360961 is 169063619872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 278916360961 - 2³ = 278916360953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 278916360896 and 278916360905.

It is not an unprimeable number, because it can be changed into a prime (278916360061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326245 + ... + 815026.

It is an arithmetic number, because the mean of its divisors is an integer number (39846370608).

Almost surely, 2^278916360961 is an apocalyptic number.

It is an amenable number.

278916360961 is a deficient number, since it is larger than the sum of its proper divisors (39854603903).

278916360961 is a wasteful number, since it uses less digits than its factorization.

278916360961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176191.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 278916360961 in words is "two hundred seventy-eight billion, nine hundred sixteen million, three hundred sixty thousand, nine hundred sixty-one".