1691964936 has 80 divisors (see below), whose sum is σ = 4809924240. Its totient is φ = 555556320.

The previous prime is 1691964907. The next prime is 1691964943. The reversal of 1691964936 is 6394691961.

1691964936 is a `hidden beast` number, since 1 + 69 + 1 + 96 + 493 + 6 = 666.

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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23931 + ... + 62901.

It is an arithmetic number, because the mean of its divisors is an integer number (60124053).

Almost surely, 2^1691964936 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 1691964936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2404962120).

1691964936 is an abundant number, since it is smaller than the sum of its proper divisors (3117959304).

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

1691964936 is a wasteful number, since it uses less digits than its factorization.

1691964936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39056 (or 39043 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 1691964936 is about 41133.5013826929. The cubic root of 1691964936 is about 1191.5998856041.

The spelling of 1691964936 in words is "one billion, six hundred ninety-one million, nine hundred sixty-four thousand, nine hundred thirty-six".