2016001778 has 16 divisors (see below), whose sum is σ = 3469150080. Its totient is φ = 860714016.

The previous prime is 2016001777. The next prime is 2016001811. The reversal of 2016001778 is 8771006102.

It is a super-2 number, since 2×2016001778² = 8128526337798322568, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2016001777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270083 + ... + 277446.

It is an arithmetic number, because the mean of its divisors is an integer number (216821880).

Almost surely, 2^2016001778 is an apocalyptic number.

2016001778 is a deficient number, since it is larger than the sum of its proper divisors (1453148302).

2016001778 is a wasteful number, since it uses less digits than its factorization.

2016001778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547801.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 2016001778 is about 44899.9084408866. The cubic root of 2016001778 is about 1263.2722909097.

The spelling of 2016001778 in words is "two billion, sixteen million, one thousand, seven hundred seventy-eight".