1693689264 has 100 divisors (see below), whose sum is σ = 4915760520. Its totient is φ = 562982400.

The previous prime is 1693689251. The next prime is 1693689269. The reversal of 1693689264 is 4629863961.

1693689264 is a `hidden beast` number, since 16 + 9 + 368 + 9 + 264 = 666.

1693689264 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1693689264.

It is not an unprimeable number, because it can be changed into a prime (1693689269) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 518067 + ... + 521325.

Almost surely, 2^1693689264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1693689264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2457880260).

1693689264 is an abundant number, since it is smaller than the sum of its proper divisors (3222071256).

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

1693689264 is a wasteful number, since it uses less digits than its factorization.

1693689264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680 (or 3665 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 1693689264 is about 41154.4561864204. The cubic root of 1693689264 is about 1192.0045455737.

The spelling of 1693689264 in words is "one billion, six hundred ninety-three million, six hundred eighty-nine thousand, two hundred sixty-four".