5640885521 has 2 divisors, whose sum is σ = 5640885522. Its totient is φ = 5640885520.

The previous prime is 5640885479. The next prime is 5640885553. The reversal of 5640885521 is 1255880465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5038870225 + 602015296 = 70985^2 + 24536^2 .

It is a cyclic number.

It is not a de Polignac number, because 5640885521 - 2²² = 5636691217 is a prime.

It is a super-2 number, since 2×5640885521² = 63639178922054882882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5640885421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820442760 + 2820442761.

It is an arithmetic number, because the mean of its divisors is an integer number (2820442761).

Almost surely, 2^5640885521 is an apocalyptic number.

It is an amenable number.

5640885521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5640885521 is an equidigital number, since it uses as much as digits as its factorization.

5640885521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384000, while the sum is 44.

The square root of 5640885521 is about 75105.8288084221. The cubic root of 5640885521 is about 1780.1192447363.

The spelling of 5640885521 in words is "five billion, six hundred forty million, eight hundred eighty-five thousand, five hundred twenty-one".