1693308645 has 80 divisors (see below), whose sum is σ = 3620010240. Its totient is φ = 740399616.

The previous prime is 1693308601. The next prime is 1693308649. The reversal of 1693308645 is 5468033961.

It is not a de Polignac number, because 1693308645 - 2³⁰ = 619566821 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1693308645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1693308649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 52221 + ... + 78189.

It is an arithmetic number, because the mean of its divisors is an integer number (45250128).

Almost surely, 2^1693308645 is an apocalyptic number.

1693308645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1693308645 is an abundant number, since it is smaller than the sum of its proper divisors (1926701595).

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

1693308645 is a wasteful number, since it uses less digits than its factorization.

1693308645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26016 (or 26007 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 1693308645 is about 41149.8316521465. The cubic root of 1693308645 is about 1191.9152467123.

The spelling of 1693308645 in words is "one billion, six hundred ninety-three million, three hundred eight thousand, six hundred forty-five".