5640737920 has 32 divisors (see below), whose sum is σ = 13484890620. Its totient is φ = 2256294912.

The previous prime is 5640737911. The next prime is 5640737933. The reversal of 5640737920 is 297370465.

It can be written as a sum of positive squares in 2 ways, for example, as 5558000704 + 82737216 = 74552^2 + 9096^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4406187 + ... + 4407466.

Almost surely, 2^5640737920 is an apocalyptic number.

It is an amenable number.

5640737920 is an abundant number, since it is smaller than the sum of its proper divisors (7844152700).

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

5640737920 is an equidigital number, since it uses as much as digits as its factorization.

5640737920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8813672 (or 8813660 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 43.

The square root of 5640737920 is about 75104.8461818543. The cubic root of 5640737920 is about 1780.1037182336.

The spelling of 5640737920 in words is "five billion, six hundred forty million, seven hundred thirty-seven thousand, nine hundred twenty".