2001335001565 has 32 divisors (see below), whose sum is σ = 2588012380800. Its totient is φ = 1480828366080.

The previous prime is 2001335001541. The next prime is 2001335001577. The reversal of 2001335001565 is 5651005331002.

It is not a de Polignac number, because 2001335001565 - 2⁹ = 2001335001053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8631571 + ... + 8860399.

It is an arithmetic number, because the mean of its divisors is an integer number (80875386900).

Almost surely, 2^{2001335001565} is an apocalyptic number.

It is an amenable number.

2001335001565 is a deficient number, since it is larger than the sum of its proper divisors (586677379235).

2001335001565 is a wasteful number, since it uses less digits than its factorization.

2001335001565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231037.

The product of its (nonzero) digits is 13500, while the sum is 31.

The spelling of 2001335001565 in words is "two trillion, one billion, three hundred thirty-five million, one thousand, five hundred sixty-five".