2104958778 has 32 divisors (see below), whose sum is σ = 4644343872. Its totient is φ = 631881600.

The previous prime is 2104958777. The next prime is 2104958783. The reversal of 2104958778 is 8778594012.

It is a self number, because there is not a number n which added to its sum of digits gives 2104958778.

It is not an unprimeable number, because it can be changed into a prime (2104958773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325908 + ... + 332303.

It is an arithmetic number, because the mean of its divisors is an integer number (145135746).

Almost surely, 2^2104958778 is an apocalyptic number.

2104958778 is an abundant number, since it is smaller than the sum of its proper divisors (2539385094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2104958778 is a wasteful number, since it uses less digits than its factorization.

2104958778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658270.

The product of its (nonzero) digits is 1128960, while the sum is 51.

The square root of 2104958778 is about 45879.8297512098. The cubic root of 2104958778 is about 1281.5863262762.

The spelling of 2104958778 in words is "two billion, one hundred four million, nine hundred fifty-eight thousand, seven hundred seventy-eight".