1689695136 has 72 divisors (see below), whose sum is σ = 4809282660. Its totient is φ = 562738176.

The previous prime is 1689695113. The next prime is 1689695141. The reversal of 1689695136 is 6315969861.

1689695136 is a `hidden beast` number, since 1 + 68 + 9 + 69 + 513 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1582448400 + 107246736 = 39780^2 + 10356^2 .

It is a tau number, because it is divible by the number of its divisors (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, 490476 + ... + 493908.

Almost surely, 2^1689695136 is an apocalyptic number.

1689695136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1689695136 is an abundant number, since it is smaller than the sum of its proper divisors (3119587524).

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

1689695136 is a wasteful number, since it uses less digits than its factorization.

1689695136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5158 (or 5147 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 1689695136 is about 41105.9014741193. The cubic root of 1689695136 is about 1191.0667965845.

The spelling of 1689695136 in words is "one billion, six hundred eighty-nine million, six hundred ninety-five thousand, one hundred thirty-six".