1013635645 has 16 divisors (see below), whose sum is σ = 1384636032. Its totient is φ = 705136960.

The previous prime is 1013635633. The next prime is 1013635703. The reversal of 1013635645 is 5465363101.

It is not a de Polignac number, because 1013635645 - 2¹⁷ = 1013504573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1013635645.

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, 399382 + ... + 401911.

It is an arithmetic number, because the mean of its divisors is an integer number (86539752).

Almost surely, 2^1013635645 is an apocalyptic number.

It is an amenable number.

1013635645 is a deficient number, since it is larger than the sum of its proper divisors (371000387).

1013635645 is a wasteful number, since it uses less digits than its factorization.

1013635645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801332.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 1013635645 is about 31837.6450919348. The cubic root of 1013635645 is about 1004.5247111112.

Adding to 1013635645 its reverse (5465363101), we get a palindrome (6478998746).

The spelling of 1013635645 in words is "one billion, thirteen million, six hundred thirty-five thousand, six hundred forty-five".