640140005320577 has 2 divisors, whose sum is σ = 640140005320578. Its totient is φ = 640140005320576.

The previous prime is 640140005320537. The next prime is 640140005320637. The reversal of 640140005320577 is 775023500041046.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612489192693361 + 27650812627216 = 24748519^2 + 5258404^2 .

It is a cyclic number.

It is not a de Polignac number, because 640140005320577 - 2²⁰ = 640140004272001 is a prime.

It is a super-2 number, since 2×640140005320577² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (640140005320507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320070002660288 + 320070002660289.

It is an arithmetic number, because the mean of its divisors is an integer number (320070002660289).

Almost surely, 2^{640140005320577} is an apocalyptic number.

It is an amenable number.

640140005320577 is a deficient number, since it is larger than the sum of its proper divisors (1).

640140005320577 is an equidigital number, since it uses as much as digits as its factorization.

640140005320577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 640140005320577 in words is "six hundred forty trillion, one hundred forty billion, five million, three hundred twenty thousand, five hundred seventy-seven".