1688868855 has 24 divisors (see below), whose sum is σ = 2955801888. Its totient is φ = 891982656.

The previous prime is 1688868851. The next prime is 1688868931. The reversal of 1688868855 is 5588688861.

It is not a de Polignac number, because 1688868855 - 2² = 1688868851 is a prime.

It is a super-2 number, since 2×1688868855² = 5704556018778022050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1688868792 and 1688868801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688868851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177552 + ... + 186821.

It is an arithmetic number, because the mean of its divisors is an integer number (123158412).

Almost surely, 2^1688868855 is an apocalyptic number.

1688868855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1688868855 is a deficient number, since it is larger than the sum of its proper divisors (1266933033).

1688868855 is a wasteful number, since it uses less digits than its factorization.

1688868855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364487 (or 364484 counting only the distinct ones).

The product of its digits is 29491200, while the sum is 63.

The square root of 1688868855 is about 41095.8496079592. The cubic root of 1688868855 is about 1190.8726163232.

The spelling of 1688868855 in words is "one billion, six hundred eighty-eight million, eight hundred sixty-eight thousand, eight hundred fifty-five".