2045544372 has 18 divisors (see below), whose sum is σ = 5170681698. Its totient is φ = 681848112.

The previous prime is 2045544341. The next prime is 2045544373. The reversal of 2045544372 is 2734455402.

2045544372 is a `hidden beast` number, since 2 + 0 + 45 + 544 + 3 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2006681616 + 38862756 = 44796^2 + 6234^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 56820677 = 2045544372 / (2 + 0 + 4 + 5 + 5 + 4 + 4 + 3 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045544373) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28410303 + ... + 28410374.

Almost surely, 2^2045544372 is an apocalyptic number.

It is an amenable number.

2045544372 is an abundant number, since it is smaller than the sum of its proper divisors (3125137326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2045544372 is a wasteful number, since it uses less digits than its factorization.

2045544372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56820687 (or 56820682 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 36.

The square root of 2045544372 is about 45227.6947455870. The cubic root of 2045544372 is about 1269.4130778396.

Adding to 2045544372 its reverse (2734455402), we get a palindrome (4779999774).

The spelling of 2045544372 in words is "two billion, forty-five million, five hundred forty-four thousand, three hundred seventy-two".