2545266061321 has 3 divisors (see below), whose sum is σ = 2545267656711. Its totient is φ = 2545264465932.

The previous prime is 2545266061307. The next prime is 2545266061339. The reversal of 2545266061321 is 1231606625452.

The square root of 2545266061321 is 1595389.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 563083651321 + 1982182410000 = 750389^2 + 1407900^2 .

It is not a de Polignac number, because 2545266061321 - 2²⁵ = 2545232506889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545266062321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 797695 + ... + 2393083.

It is an arithmetic number, because the mean of its divisors is an integer number (848422552237).

Almost surely, 2^{2545266061321} is an apocalyptic number.

2545266061321 is the 1595389-th square number.

2545266061321 is the 797695-th centered octagonal number.

It is an amenable number.

2545266061321 is a deficient number, since it is larger than the sum of its proper divisors (1595390).

2545266061321 is an frugal number, since it uses more digits than its factorization.

2545266061321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3190778 (or 1595389 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 2545266061321 in words is "two trillion, five hundred forty-five billion, two hundred sixty-six million, sixty-one thousand, three hundred twenty-one".