640060601 has 2 divisors, whose sum is σ = 640060602. Its totient is φ = 640060600.

The previous prime is 640060579. The next prime is 640060637. The reversal of 640060601 is 106060046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 513475600 + 126585001 = 22660^2 + 11251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640060601 is a prime.

It is not a weakly prime, because it can be changed into another prime (640060801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320030300 + 320030301.

It is an arithmetic number, because the mean of its divisors is an integer number (320030301).

Almost surely, 2^640060601 is an apocalyptic number.

It is an amenable number.

640060601 is a deficient number, since it is larger than the sum of its proper divisors (1).

640060601 is an equidigital number, since it uses as much as digits as its factorization.

640060601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 640060601 is about 25299.4189854234. The cubic root of 640060601 is about 861.8010753411.

The spelling of 640060601 in words is "six hundred forty million, sixty thousand, six hundred one".