2091612278 has 16 divisors (see below), whose sum is σ = 3669008640. Its totient is φ = 875558376.

The previous prime is 2091612239. The next prime is 2091612293. The reversal of 2091612278 is 8722161902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1736618 + ... + 1737821.

It is an arithmetic number, because the mean of its divisors is an integer number (229313040).

Almost surely, 2^2091612278 is an apocalyptic number.

2091612278 is a deficient number, since it is larger than the sum of its proper divisors (1577396362).

2091612278 is a wasteful number, since it uses less digits than its factorization.

2091612278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474491.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 2091612278 is about 45734.1478328830. The cubic root of 2091612278 is about 1278.8719468221.

The spelling of 2091612278 in words is "two billion, ninety-one million, six hundred twelve thousand, two hundred seventy-eight".