5645151820 has 72 divisors (see below), whose sum is σ = 15043991760. Its totient is φ = 1759524480.

The previous prime is 5645151781. The next prime is 5645151823. The reversal of 5645151820 is 281515465.

It is a self number, because there is not a number n which added to its sum of digits gives 5645151820.

It is not an unprimeable number, because it can be changed into a prime (5645151823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251055 + ... + 272614.

It is an arithmetic number, because the mean of its divisors is an integer number (208944330).

Almost surely, 2^5645151820 is an apocalyptic number.

It is an amenable number.

5645151820 is an abundant number, since it is smaller than the sum of its proper divisors (9398839940).

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

5645151820 is a wasteful number, since it uses less digits than its factorization.

5645151820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523703 (or 523694 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 37.

The square root of 5645151820 is about 75134.2253570235. The cubic root of 5645151820 is about 1780.5679099389.

The spelling of 5645151820 in words is "five billion, six hundred forty-five million, one hundred fifty-one thousand, eight hundred twenty".