2137808906 has 8 divisors (see below), whose sum is σ = 3208706244. Its totient is φ = 1068240160.

The previous prime is 2137808879. The next prime is 2137808963. The reversal of 2137808906 is 6098087312.

It can be written as a sum of positive squares in 2 ways, for example, as 2130653281 + 7155625 = 46159^2 + 2675^2 .

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, 328115 + ... + 334566.

Almost surely, 2^2137808906 is an apocalyptic number.

2137808906 is a deficient number, since it is larger than the sum of its proper divisors (1070897338).

2137808906 is a wasteful number, since it uses less digits than its factorization.

2137808906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664296.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 2137808906 is about 46236.4456462648. The cubic root of 2137808906 is about 1288.2187835624.

The spelling of 2137808906 in words is "two billion, one hundred thirty-seven million, eight hundred eight thousand, nine hundred six".