2646978085 has 8 divisors (see below), whose sum is σ = 3178359936. Its totient is φ = 2116258320.

The previous prime is 2646978077. The next prime is 2646978097. The reversal of 2646978085 is 5808796462.

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

It is not a de Polignac number, because 2646978085 - 2³ = 2646978077 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 156681 + ... + 172750.

It is an arithmetic number, because the mean of its divisors is an integer number (397294992).

Almost surely, 2^2646978085 is an apocalyptic number.

It is an amenable number.

2646978085 is a deficient number, since it is larger than the sum of its proper divisors (531381851).

2646978085 is a wasteful number, since it uses less digits than its factorization.

2646978085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331043.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The square root of 2646978085 is about 51448.7908993010. The cubic root of 2646978085 is about 1383.3012898498.

The spelling of 2646978085 in words is "two billion, six hundred forty-six million, nine hundred seventy-eight thousand, eighty-five".