2006778163544 has 32 divisors (see below), whose sum is σ = 4691169734400. Its totient is φ = 781861621920.

The previous prime is 2006778163543. The next prime is 2006778163583. The reversal of 2006778163544 is 4453618776002.

It is a super-3 number, since 3×2006778163544³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006778163543) 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, 1628877764 + ... + 1628878995.

It is an arithmetic number, because the mean of its divisors is an integer number (146599054200).

Almost surely, 2^{2006778163544} is an apocalyptic number.

It is an amenable number.

2006778163544 is an abundant number, since it is smaller than the sum of its proper divisors (2684391570856).

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

2006778163544 is a wasteful number, since it uses less digits than its factorization.

2006778163544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3257756783 (or 3257756779 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 2006778163544 in words is "two trillion, six billion, seven hundred seventy-eight million, one hundred sixty-three thousand, five hundred forty-four".