1980878616 has 96 divisors (see below), whose sum is σ = 5428285200. Its totient is φ = 652538880.

The previous prime is 1980878561. The next prime is 1980878621. The reversal of 1980878616 is 6168780891.

1980878616 is a `hidden beast` number, since 19 + 8 + 0 + 8 + 7 + 8 + 616 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4034131 + ... + 4034621.

Almost surely, 2^1980878616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1980878616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2714142600).

1980878616 is an abundant number, since it is smaller than the sum of its proper divisors (3447406584).

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

1980878616 is a wasteful number, since it uses less digits than its factorization.

1980878616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 1980878616 is about 44507.0625406800. The cubic root of 1980878616 is about 1255.8929463032.

The spelling of 1980878616 in words is "one billion, nine hundred eighty million, eight hundred seventy-eight thousand, six hundred sixteen".