2545010805481 has 3 divisors (see below), whose sum is σ = 2545012400791. Its totient is φ = 2545009210172.

The previous prime is 2545010805419. The next prime is 2545010805509. The reversal of 2545010805481 is 1845080105452.

The square root of 2545010805481 is 1595309.

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., 148025637081 + 2396985168400 = 384741^2 + 1548220^2 .

It is not a de Polignac number, because 2545010805481 - 2¹³ = 2545010797289 is a prime.

It is a super-2 number, since 2×2545010805481² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545010805781) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 797655 + ... + 2392963.

Almost surely, 2^{2545010805481} is an apocalyptic number.

2545010805481 is the 1595309-th square number.

2545010805481 is the 797655-th centered octagonal number.

It is an amenable number.

2545010805481 is a deficient number, since it is larger than the sum of its proper divisors (1595310).

2545010805481 is an frugal number, since it uses more digits than its factorization.

2545010805481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190618 (or 1595309 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 43.

The spelling of 2545010805481 in words is "two trillion, five hundred forty-five billion, ten million, eight hundred five thousand, four hundred eighty-one".