2145201652540 has 12 divisors (see below), whose sum is σ = 4504923470376. Its totient is φ = 858080661008.

The previous prime is 2145201652453. The next prime is 2145201652549. The reversal of 2145201652540 is 452561025412.

It is a self number, because there is not a number n which added to its sum of digits gives 2145201652540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145201652549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53630041294 + ... + 53630041333.

It is an arithmetic number, because the mean of its divisors is an integer number (375410289198).

Almost surely, 2^{2145201652540} is an apocalyptic number.

2145201652540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145201652540 is an abundant number, since it is smaller than the sum of its proper divisors (2359721817836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145201652540 is a wasteful number, since it uses less digits than its factorization.

2145201652540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107260082636 (or 107260082634 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 2145201652540 its reverse (452561025412), we get a palindrome (2597762677952).

The spelling of 2145201652540 in words is "two trillion, one hundred forty-five billion, two hundred one million, six hundred fifty-two thousand, five hundred forty".