1968646780 has 12 divisors (see below), whose sum is σ = 4134158280. Its totient is φ = 787458704.

The previous prime is 1968646739. The next prime is 1968646793. The reversal of 1968646780 is 876468691.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49216150 + ... + 49216189.

It is an arithmetic number, because the mean of its divisors is an integer number (344513190).

Almost surely, 2^1968646780 is an apocalyptic number.

1968646780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1968646780 is an abundant number, since it is smaller than the sum of its proper divisors (2165511500).

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

1968646780 is a wasteful number, since it uses less digits than its factorization.

1968646780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98432348 (or 98432346 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 1968646780 is about 44369.4352003719. The cubic root of 1968646780 is about 1253.3025797557.

It can be divided in two parts, 19686 and 46780, that added together give a palindrome (66466).

The spelling of 1968646780 in words is "one billion, nine hundred sixty-eight million, six hundred forty-six thousand, seven hundred eighty".