5621566540 has 24 divisors (see below), whose sum is σ = 11837472192. Its totient is φ = 2242496640.

The previous prime is 5621566519. The next prime is 5621566549. The reversal of 5621566540 is 456651265.

It is a junction number, because it is equal to n+sod(n) for n = 5621566493 and 5621566502.

It is not an unprimeable number, because it can be changed into a prime (5621566549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375601 + ... + 390280.

It is an arithmetic number, because the mean of its divisors is an integer number (493228008).

Almost surely, 2^5621566540 is an apocalyptic number.

It is an amenable number.

5621566540 is an abundant number, since it is smaller than the sum of its proper divisors (6215905652).

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

5621566540 is a wasteful number, since it uses less digits than its factorization.

5621566540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766257 (or 766255 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 5621566540 is about 74977.1067726676. The cubic root of 5621566540 is about 1778.0847281998.

The spelling of 5621566540 in words is "five billion, six hundred twenty-one million, five hundred sixty-six thousand, five hundred forty".