2015999994 has 8 divisors (see below), whose sum is σ = 4032000000. Its totient is φ = 671999996.

The previous prime is 2015999941. The next prime is 2016000001. The reversal of 2015999994 is 4999995102.

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

2015999994 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 167999994 + ... + 168000005.

It is an arithmetic number, because the mean of its divisors is an integer number (504000000).

Almost surely, 2^2015999994 is an apocalyptic number.

2015999994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2015999994 is a wasteful number, since it uses less digits than its factorization.

2015999994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336000004.

The product of its (nonzero) digits is 2361960, while the sum is 57.

The square root of 2015999994 is about 44899.8885744720. Note that the first 3 decimals coincide. The cubic root of 2015999994 is about 1263.2719182780.

The spelling of 2015999994 in words is "two billion, fifteen million, nine hundred ninety-nine thousand, nine hundred ninety-four".