2025553645 has 4 divisors (see below), whose sum is σ = 2430664380. Its totient is φ = 1620442912.

The previous prime is 2025553643. The next prime is 2025553669. The reversal of 2025553645 is 5463555202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1210622436 + 814931209 = 34794^2 + 28547^2 .

It is a cyclic number.

It is not a de Polignac number, because 2025553645 - 2¹ = 2025553643 is a prime.

It is a super-3 number, since 3×2025553645³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2025553643) 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, 202555360 + ... + 202555369.

It is an arithmetic number, because the mean of its divisors is an integer number (607666095).

Almost surely, 2^2025553645 is an apocalyptic number.

It is an amenable number.

2025553645 is a deficient number, since it is larger than the sum of its proper divisors (405110735).

2025553645 is an equidigital number, since it uses as much as digits as its factorization.

2025553645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405110734.

The product of its (nonzero) digits is 180000, while the sum is 37.

The square root of 2025553645 is about 45006.1511906984. The cubic root of 2025553645 is about 1265.2642867743.

The spelling of 2025553645 in words is "two billion, twenty-five million, five hundred fifty-three thousand, six hundred forty-five".