1645530626 has 8 divisors (see below), whose sum is σ = 2470260240. Its totient is φ = 822110548.

The previous prime is 1645530619. The next prime is 1645530647. The reversal of 1645530626 is 6260355461.

It is a happy number.

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

It is a super-2 number, since 2×1645530626² = 5415542082207903752, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1645530626.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324236 + ... + 329271.

It is an arithmetic number, because the mean of its divisors is an integer number (308782530).

Almost surely, 2^1645530626 is an apocalyptic number.

1645530626 is a deficient number, since it is larger than the sum of its proper divisors (824729614).

1645530626 is a wasteful number, since it uses less digits than its factorization.

1645530626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654768.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 1645530626 is about 40565.1405273050. The cubic root of 1645530626 is about 1180.5978551377.

The spelling of 1645530626 in words is "one billion, six hundred forty-five million, five hundred thirty thousand, six hundred twenty-six".