1646709896 has 64 divisors (see below), whose sum is σ = 3606709680. Its totient is φ = 697835520.

The previous prime is 1646709893. The next prime is 1646709919. The reversal of 1646709896 is 6989076461.

1646709896 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 8 ways, for example, as 218625796 + 1428084100 = 14786^2 + 37790^2 .

It is not an unprimeable number, because it can be changed into a prime (1646709893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61130 + ... + 83846.

Almost surely, 2^1646709896 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 1646709896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1803354840).

1646709896 is an abundant number, since it is smaller than the sum of its proper divisors (1959999784).

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

1646709896 is a wasteful number, since it uses less digits than its factorization.

1646709896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22794 (or 22790 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 1646709896 is about 40579.6734338757. The cubic root of 1646709896 is about 1180.8798130584.

The spelling of 1646709896 in words is "one billion, six hundred forty-six million, seven hundred nine thousand, eight hundred ninety-six".