1688338833690 has 64 divisors (see below), whose sum is σ = 4112945216640. Its totient is φ = 443454950400.

The previous prime is 1688338833689. The next prime is 1688338833707. The reversal of 1688338833690 is 963388338861.

It is a happy number.

It is a super-2 number, since 2×1688338833690² (a number of 25 digits) contains 22 as substring.

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, 20398390 + ... + 20480990.

It is an arithmetic number, because the mean of its divisors is an integer number (64264769010).

Almost surely, 2^{1688338833690} is an apocalyptic number.

1688338833690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1688338833690 is an abundant number, since it is smaller than the sum of its proper divisors (2424606382950).

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

1688338833690 is a wasteful number, since it uses less digits than its factorization.

1688338833690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92847.

The product of its (nonzero) digits is 107495424, while the sum is 66.

The spelling of 1688338833690 in words is "one trillion, six hundred eighty-eight billion, three hundred thirty-eight million, eight hundred thirty-three thousand, six hundred ninety".