1689651818496 has 156 divisors (see below), whose sum is σ = 4882066658560. Its totient is φ = 563050414080.

The previous prime is 1689651818471. The next prime is 1689651818557. The reversal of 1689651818496 is 6948181569861.

1689651818496 is a `hidden beast` number, since 1 + 6 + 8 + 9 + 6 + 51 + 81 + 8 + 496 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 231170490 + ... + 231177798.

Almost surely, 2^{1689651818496} is an apocalyptic number.

1689651818496 is a gapful number since it is divisible by the number (16) 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 1689651818496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2441033329280).

1689651818496 is an abundant number, since it is smaller than the sum of its proper divisors (3192414840064).

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

1689651818496 is an equidigital number, since it uses as much as digits as its factorization.

1689651818496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13610 (or 13585 counting only the distinct ones).

The product of its digits is 179159040, while the sum is 72.

The spelling of 1689651818496 in words is "one trillion, six hundred eighty-nine billion, six hundred fifty-one million, eight hundred eighteen thousand, four hundred ninety-six".