1868705505 has 32 divisors (see below), whose sum is σ = 3324222720. Its totient is φ = 996019200.

The previous prime is 1868705497. The next prime is 1868705507. The reversal of 1868705505 is 5055078681.

1868705505 is a `hidden beast` number, since 18 + 6 + 87 + 0 + 550 + 5 = 666.

It is not a de Polignac number, because 1868705505 - 2³ = 1868705497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1868705507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 281980 + ... + 288530.

It is an arithmetic number, because the mean of its divisors is an integer number (103881960).

Almost surely, 2^1868705505 is an apocalyptic number.

1868705505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1868705505 is a deficient number, since it is larger than the sum of its proper divisors (1455517215).

1868705505 is a wasteful number, since it uses less digits than its factorization.

1868705505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8678 (or 8672 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 45.

The square root of 1868705505 is about 43228.5265189550. The cubic root of 1868705505 is about 1231.7246182109.

The spelling of 1868705505 in words is "one billion, eight hundred sixty-eight million, seven hundred five thousand, five hundred five".