9919795860 has 72 divisors (see below), whose sum is σ = 32404674120. Its totient is φ = 2441795328.

The previous prime is 9919795829. The next prime is 9919795877. The reversal of 9919795860 is 685979199.

It can be written as a sum of positive squares in 4 ways, for example, as 269091216 + 9650704644 = 16404^2 + 98238^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2117275 + ... + 2121954.

Almost surely, 2^9919795860 is an apocalyptic number.

9919795860 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9919795860 is an abundant number, since it is smaller than the sum of its proper divisors (22484878260).

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

9919795860 is a wasteful number, since it uses less digits than its factorization.

9919795860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239257 (or 4239252 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 63.

The square root of 9919795860 is about 99598.1719711763. The cubic root of 9919795860 is about 2148.6594029541.

The spelling of 9919795860 in words is "nine billion, nine hundred nineteen million, seven hundred ninety-five thousand, eight hundred sixty".