1691424468 has 36 divisors (see below), whose sum is σ = 4306766100. Its totient is φ = 559691136.

The previous prime is 1691424463. The next prime is 1691424529. The reversal of 1691424468 is 8644241961.

1691424468 is a `hidden beast` number, since 1 + 69 + 142 + 446 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1358069904 + 333354564 = 36852^2 + 18258^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1691424461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166543 + ... + 176406.

Almost surely, 2^1691424468 is an apocalyptic number.

1691424468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1691424468 is an abundant number, since it is smaller than the sum of its proper divisors (2615341632).

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

1691424468 is a wasteful number, since it uses less digits than its factorization.

1691424468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343096 (or 343091 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 1691424468 is about 41126.9311765417. The cubic root of 1691424468 is about 1191.4729936535.

The spelling of 1691424468 in words is "one billion, six hundred ninety-one million, four hundred twenty-four thousand, four hundred sixty-eight".