2691920090 has 8 divisors (see below), whose sum is σ = 4845456180. Its totient is φ = 1076768032.

The previous prime is 2691920087. The next prime is 2691920111. The reversal of 2691920090 is 900291962.

It can be written as a sum of positive squares in 2 ways, for example, as 2338592881 + 353327209 = 48359^2 + 18797^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134595995 + ... + 134596014.

Almost surely, 2^2691920090 is an apocalyptic number.

2691920090 is a deficient number, since it is larger than the sum of its proper divisors (2153536090).

2691920090 is a wasteful number, since it uses less digits than its factorization.

2691920090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269192016.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 2691920090 is about 51883.7170025433. The cubic root of 2691920090 is about 1391.0862392336.

The spelling of 2691920090 in words is "two billion, six hundred ninety-one million, nine hundred twenty thousand, ninety".