1001545645 has 16 divisors (see below), whose sum is σ = 1219599360. Its totient is φ = 789459264.

The previous prime is 1001545639. The next prime is 1001545673. The reversal of 1001545645 is 5465451001.

It is a cyclic number.

It is not a de Polignac number, because 1001545645 - 2⁹ = 1001545133 is a prime.

It is a super-3 number, since 3×1001545645³ (a number of 28 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 15 ways as a sum of consecutive naturals, for example, 161716 + ... + 167794.

It is an arithmetic number, because the mean of its divisors is an integer number (76224960).

Almost surely, 2^1001545645 is an apocalyptic number.

It is an amenable number.

1001545645 is a deficient number, since it is larger than the sum of its proper divisors (218053715).

1001545645 is an equidigital number, since it uses as much as digits as its factorization.

1001545645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6564.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 1001545645 is about 31647.2059588204. The cubic root of 1001545645 is about 1000.5149497812.

Adding to 1001545645 its reverse (5465451001), we get a palindrome (6466996646).

The spelling of 1001545645 in words is "one billion, one million, five hundred forty-five thousand, six hundred forty-five".