279940856385 has 8 divisors (see below), whose sum is σ = 447905370240. Its totient is φ = 149301790064.

The previous prime is 279940856359. The next prime is 279940856401. The reversal of 279940856385 is 583658049972.

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 279940856385 - 2⁵ = 279940856353 is a prime.

It is an unprimeable number.

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, 9331361865 + ... + 9331361894.

It is an arithmetic number, because the mean of its divisors is an integer number (55988171280).

Almost surely, 2^279940856385 is an apocalyptic number.

It is an amenable number.

279940856385 is a deficient number, since it is larger than the sum of its proper divisors (167964513855).

279940856385 is a wasteful number, since it uses less digits than its factorization.

279940856385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18662723767.

The product of its (nonzero) digits is 130636800, while the sum is 66.

The spelling of 279940856385 in words is "two hundred seventy-nine billion, nine hundred forty million, eight hundred fifty-six thousand, three hundred eighty-five".