2011999957 has 16 divisors (see below), whose sum is σ = 2292877440. Its totient is φ = 1747627200.

The previous prime is 2011999933. The next prime is 2011999991. The reversal of 2011999957 is 7599991102.

It is a happy number.

It is not a de Polignac number, because 2011999957 - 2²⁷ = 1877782229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011999907) 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, 254419 + ... + 262207.

It is an arithmetic number, because the mean of its divisors is an integer number (143304840).

Almost surely, 2^2011999957 is an apocalyptic number.

It is an amenable number.

2011999957 is a deficient number, since it is larger than the sum of its proper divisors (280877483).

2011999957 is a wasteful number, since it uses less digits than its factorization.

2011999957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8844.

The product of its (nonzero) digits is 459270, while the sum is 52.

The square root of 2011999957 is about 44855.3225046928. The cubic root of 2011999957 is about 1262.4358600490.

The spelling of 2011999957 in words is "two billion, eleven million, nine hundred ninety-nine thousand, nine hundred fifty-seven".