2001555430216 has 8 divisors (see below), whose sum is σ = 3752916431670. Its totient is φ = 1000777715104.

The previous prime is 2001555430213. The next prime is 2001555430313. The reversal of 2001555430216 is 6120345551002.

It can be written as a sum of positive squares in only one way, i.e., 1954834607716 + 46720822500 = 1398154^2 + 216150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2001555430213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125097214381 + ... + 125097214396.

Almost surely, 2^{2001555430216} is an apocalyptic number.

It is an amenable number.

2001555430216 is a deficient number, since it is larger than the sum of its proper divisors (1751361001454).

2001555430216 is a wasteful number, since it uses less digits than its factorization.

2001555430216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250194428783 (or 250194428779 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 2001555430216 in words is "two trillion, one billion, five hundred fifty-five million, four hundred thirty thousand, two hundred sixteen".