1659373645 has 8 divisors (see below), whose sum is σ = 2096051040. Its totient is φ = 1257630480.

The previous prime is 1659373637. The next prime is 1659373693. The reversal of 1659373645 is 5463739561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1659373645 - 2³ = 1659373637 is a prime.

It is a super-3 number, since 3×1659373645³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8733451 + ... + 8733640.

It is an arithmetic number, because the mean of its divisors is an integer number (262006380).

Almost surely, 2^1659373645 is an apocalyptic number.

It is an amenable number.

1659373645 is a deficient number, since it is larger than the sum of its proper divisors (436677395).

1659373645 is a wasteful number, since it uses less digits than its factorization.

1659373645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17467115.

The product of its digits is 2041200, while the sum is 49.

The square root of 1659373645 is about 40735.4102102827. The cubic root of 1659373645 is about 1183.8992062225.

The spelling of 1659373645 in words is "one billion, six hundred fifty-nine million, three hundred seventy-three thousand, six hundred forty-five".