2099551378 has 8 divisors (see below), whose sum is σ = 3149575740. Its totient is φ = 1049692800.

The previous prime is 2099551373. The next prime is 2099551379. The reversal of 2099551378 is 8731559902.

It can be written as a sum of positive squares in 2 ways, for example, as 2098281249 + 1270129 = 45807^2 + 1127^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2099551373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2443 + ... + 64846.

Almost surely, 2^2099551378 is an apocalyptic number.

2099551378 is a deficient number, since it is larger than the sum of its proper divisors (1050024362).

2099551378 is a wasteful number, since it uses less digits than its factorization.

2099551378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82892.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 2099551378 is about 45820.8618207908. The cubic root of 2099551378 is about 1280.4879686540.

The spelling of 2099551378 in words is "two billion, ninety-nine million, five hundred fifty-one thousand, three hundred seventy-eight".