640126201057 has 32 divisors (see below), whose sum is σ = 765476167680. Its totient is φ = 524376159120.

The previous prime is 640126201051. The next prime is 640126201081. The reversal of 640126201057 is 750102621046.

640126201057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-640126201057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640126201051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131413332 + ... + 131418202.

It is an arithmetic number, because the mean of its divisors is an integer number (23921130240).

Almost surely, 2^640126201057 is an apocalyptic number.

It is an amenable number.

640126201057 is a deficient number, since it is larger than the sum of its proper divisors (125349966623).

640126201057 is an equidigital number, since it uses as much as digits as its factorization.

640126201057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6490 (or 6444 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 640126201057 in words is "six hundred forty billion, one hundred twenty-six million, two hundred one thousand, fifty-seven".