1659680399364 has 96 divisors (see below), whose sum is σ = 4188714356736. Its totient is φ = 508441802880.

The previous prime is 1659680399353. The next prime is 1659680399473. The reversal of 1659680399364 is 4639930869561.

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 31 ways as a sum of consecutive naturals, for example, 43014409 + ... + 43052975.

It is an arithmetic number, because the mean of its divisors is an integer number (43632441216).

Almost surely, 2^{1659680399364} 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 1659680399364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2094357178368).

1659680399364 is an abundant number, since it is smaller than the sum of its proper divisors (2529033957372).

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

1659680399364 is a wasteful number, since it uses less digits than its factorization.

1659680399364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39785 (or 39783 counting only the distinct ones).

The product of its (nonzero) digits is 226748160, while the sum is 69.

The spelling of 1659680399364 in words is "one trillion, six hundred fifty-nine billion, six hundred eighty million, three hundred ninety-nine thousand, three hundred sixty-four".