1688216279304 has 64 divisors (see below), whose sum is σ = 4224516042240. Its totient is φ = 562208998400.

The previous prime is 1688216279297. The next prime is 1688216279329. The reversal of 1688216279304 is 4039726128861.

It is a happy number.

It is a super-3 number, since 3×1688216279304³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128365129 + ... + 128378279.

It is an arithmetic number, because the mean of its divisors is an integer number (66008063160).

Almost surely, 2^{1688216279304} is an apocalyptic number.

It is an amenable number.

1688216279304 is an abundant number, since it is smaller than the sum of its proper divisors (2536299762936).

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

1688216279304 is a wasteful number, since it uses less digits than its factorization.

1688216279304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17790 (or 17786 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 1688216279304 in words is "one trillion, six hundred eighty-eight billion, two hundred sixteen million, two hundred seventy-nine thousand, three hundred four".