2001540536 has 16 divisors (see below), whose sum is σ = 3764732040. Its totient is φ = 997612000.

The previous prime is 2001540529. The next prime is 2001540539. The reversal of 2001540536 is 6350451002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001540539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392090 + ... + 397161.

Almost surely, 2^2001540536 is an apocalyptic number.

It is an amenable number.

2001540536 is a deficient number, since it is larger than the sum of its proper divisors (1763191504).

2001540536 is a wasteful number, since it uses less digits than its factorization.

2001540536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789574 (or 789570 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 2001540536 is about 44738.5799506422. The cubic root of 2001540536 is about 1260.2444591609.

Adding to 2001540536 its reverse (6350451002), we get a palindrome (8351991538).

The spelling of 2001540536 in words is "two billion, one million, five hundred forty thousand, five hundred thirty-six".