2145200565545 has 16 divisors (see below), whose sum is σ = 2577487955328. Its totient is φ = 1713995986560.

The previous prime is 2145200565493. The next prime is 2145200565617. The reversal of 2145200565545 is 5455650025412.

It is not a de Polignac number, because 2145200565545 - 2¹⁸ = 2145200303401 is a prime.

It is a super-2 number, since 2×2145200565545² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2145200565496 and 2145200565505.

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, 68505782 + ... + 68537088.

It is an arithmetic number, because the mean of its divisors is an integer number (161092997208).

Almost surely, 2^{2145200565545} is an apocalyptic number.

It is an amenable number.

2145200565545 is a deficient number, since it is larger than the sum of its proper divisors (432287389783).

2145200565545 is a wasteful number, since it uses less digits than its factorization.

2145200565545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48160.

The product of its (nonzero) digits is 1200000, while the sum is 44.

The spelling of 2145200565545 in words is "two trillion, one hundred forty-five billion, two hundred million, five hundred sixty-five thousand, five hundred forty-five".