2545980845769 has 9 divisors (see below), whose sum is σ = 3677534802669. Its totient is φ = 1697317372620.

The previous prime is 2545980845767. The next prime is 2545980845801. The reversal of 2545980845769 is 9675480895452.

The square root of 2545980845769 is 1595613.

It is a perfect power (a square), and thus also a powerful number.

2545980845769 is a `hidden beast` number, since 2 + 5 + 45 + 9 + 8 + 0 + 8 + 4 + 576 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2545980845769 - 2¹ = 2545980845767 is a prime.

It is a super-2 number, since 2×2545980845769² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2545980845697 and 2545980845706.

It is not an unprimeable number, because it can be changed into a prime (2545980845761) 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 8 ways as a sum of consecutive naturals, for example, 4520904 + ... + 5052774.

Almost surely, 2^{2545980845769} is an apocalyptic number.

2545980845769 is the 1595613-rd square number.

2545980845769 is the 797807-th centered octagonal number.

It is an amenable number.

2545980845769 is a deficient number, since it is larger than the sum of its proper divisors (1131553956900).

2545980845769 is an frugal number, since it uses more digits than its factorization.

2545980845769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063748 (or 531874 counting only the distinct ones).

The product of its (nonzero) digits is 870912000, while the sum is 72.

The spelling of 2545980845769 in words is "two trillion, five hundred forty-five billion, nine hundred eighty million, eight hundred forty-five thousand, seven hundred sixty-nine".