206778419760 has 480 divisors, whose sum is σ = 723172089024. Its totient is φ = 48822681600.

The previous prime is 206778419741. The next prime is 206778419767. The reversal of 206778419760 is 67914877602.

It is a self number, because there is not a number n which added to its sum of digits gives 206778419760.

It is not an unprimeable number, because it can be changed into a prime (206778419767) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 200172204 + ... + 200173236.

Almost surely, 2^206778419760 is an apocalyptic number.

206778419760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206778419760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361586044512).

206778419760 is an abundant number, since it is smaller than the sum of its proper divisors (516393669264).

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

206778419760 is a wasteful number, since it uses less digits than its factorization.

206778419760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245 (or 1228 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 57.

The spelling of 206778419760 in words is "two hundred six billion, seven hundred seventy-eight million, four hundred nineteen thousand, seven hundred sixty".