279955906561 has 8 divisors (see below), whose sum is σ = 287551192320. Its totient is φ = 272362142448.

The previous prime is 279955906553. The next prime is 279955906567. The reversal of 279955906561 is 165609559972.

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 279955906561 - 2³ = 279955906553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 279955906493 and 279955906502.

It is not an unprimeable number, because it can be changed into a prime (279955906567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2431 + ... + 748276.

It is an arithmetic number, because the mean of its divisors is an integer number (35943899040).

Almost surely, 2^279955906561 is an apocalyptic number.

It is an amenable number.

279955906561 is a deficient number, since it is larger than the sum of its proper divisors (7595285759).

279955906561 is a wasteful number, since it uses less digits than its factorization.

279955906561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760823.

The product of its (nonzero) digits is 45927000, while the sum is 64.

The spelling of 279955906561 in words is "two hundred seventy-nine billion, nine hundred fifty-five million, nine hundred six thousand, five hundred sixty-one".