2045550553 has 4 divisors (see below), whose sum is σ = 2046560740. Its totient is φ = 2044540368.

The previous prime is 2045550527. The next prime is 2045550569. The reversal of 2045550553 is 3550555402.

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 1911176089 + 134374464 = 43717^2 + 11592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2045550553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2045556553) 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, 502050 + ... + 506107.

It is an arithmetic number, because the mean of its divisors is an integer number (511640185).

Almost surely, 2^2045550553 is an apocalyptic number.

It is an amenable number.

2045550553 is a deficient number, since it is larger than the sum of its proper divisors (1010187).

2045550553 is a wasteful number, since it uses less digits than its factorization.

2045550553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010186.

The product of its (nonzero) digits is 75000, while the sum is 34.

The square root of 2045550553 is about 45227.7630775611. The cubic root of 2045550553 is about 1269.4143564290.

The spelling of 2045550553 in words is "two billion, forty-five million, five hundred fifty thousand, five hundred fifty-three".