19649616260 has 96 divisors (see below), whose sum is σ = 44876063232. Its totient is φ = 7198248960.

The previous prime is 19649616247. The next prime is 19649616293. The reversal of 19649616260 is 6261694691.

It is a super-2 number, since 2×19649616260² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19649616199 and 19649616208.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4105829 + ... + 4110611.

It is an arithmetic number, because the mean of its divisors is an integer number (467458992).

Almost surely, 2^19649616260 is an apocalyptic number.

19649616260 is a gapful number since it is divisible by the number (10) 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 19649616260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22438031616).

19649616260 is an abundant number, since it is smaller than the sum of its proper divisors (25226446972).

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

19649616260 is a wasteful number, since it uses less digits than its factorization.

19649616260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133 (or 5131 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 19649616260 in words is "nineteen billion, six hundred forty-nine million, six hundred sixteen thousand, two hundred sixty".