5646144645 has 24 divisors (see below), whose sum is σ = 10025352792. Its totient is φ = 2937830400.

The previous prime is 5646144619. The next prime is 5646144661. The reversal of 5646144645 is 5464416465.

5646144645 is a `hidden beast` number, since 564 + 6 + 1 + 4 + 46 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 506115009 + 5140029636 = 22497^2 + 71694^2 .

It is not a de Polignac number, because 5646144645 - 2²³ = 5637756037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5646144645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1528276 + ... + 1531965.

It is an arithmetic number, because the mean of its divisors is an integer number (417723033).

Almost surely, 2^5646144645 is an apocalyptic number.

It is an amenable number.

5646144645 is a deficient number, since it is larger than the sum of its proper divisors (4379208147).

5646144645 is a wasteful number, since it uses less digits than its factorization.

5646144645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3060293 (or 3060290 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The square root of 5646144645 is about 75140.8320755101. The cubic root of 5646144645 is about 1780.6722879235.

The spelling of 5646144645 in words is "five billion, six hundred forty-six million, one hundred forty-four thousand, six hundred forty-five".