2001955555 has 8 divisors (see below), whose sum is σ = 2424799152. Its totient is φ = 1586596128.

The previous prime is 2001955477. The next prime is 2001955561. The reversal of 2001955555 is 5555591002.

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

It is a cyclic number.

It is not a de Polignac number, because 2001955555 - 2⁷ = 2001955427 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 1870452 + ... + 1871521.

It is an arithmetic number, because the mean of its divisors is an integer number (303099894).

Almost surely, 2^2001955555 is an apocalyptic number.

2001955555 is a deficient number, since it is larger than the sum of its proper divisors (422843597).

2001955555 is a wasteful number, since it uses less digits than its factorization.

2001955555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742085.

The product of its (nonzero) digits is 56250, while the sum is 37.

The square root of 2001955555 is about 44743.2179777003. The cubic root of 2001955555 is about 1260.3315569472.

The spelling of 2001955555 in words is "two billion, one million, nine hundred fifty-five thousand, five hundred fifty-five".