2001132645615 has 24 divisors (see below), whose sum is σ = 3468672738960. Its totient is φ = 1067257569024.

The previous prime is 2001132645593. The next prime is 2001132645643. The reversal of 2001132645615 is 5165462311002.

2001132645615 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 1 + 3 + 2 + 645 + 6 + 1 + 5 = 666.

It is not a de Polignac number, because 2001132645615 - 2⁷ = 2001132645487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001132645615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4219959 + ... + 4670151.

It is an arithmetic number, because the mean of its divisors is an integer number (144528030790).

Almost surely, 2^{2001132645615} is an apocalyptic number.

2001132645615 is a deficient number, since it is larger than the sum of its proper divisors (1467540093345).

2001132645615 is a wasteful number, since it uses less digits than its factorization.

2001132645615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548983 (or 548980 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 2001132645615 its reverse (5165462311002), we get a palindrome (7166594956617).

The spelling of 2001132645615 in words is "two trillion, one billion, one hundred thirty-two million, six hundred forty-five thousand, six hundred fifteen".