640142246201 has 4 divisors (see below), whose sum is σ = 643975433472. Its totient is φ = 636309058932.

The previous prime is 640142246167. The next prime is 640142246203. The reversal of 640142246201 is 102642241046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 640142246201 - 2³⁴ = 622962377017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640142246203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1916593385 + ... + 1916593718.

It is an arithmetic number, because the mean of its divisors is an integer number (160993858368).

Almost surely, 2^640142246201 is an apocalyptic number.

It is an amenable number.

640142246201 is a deficient number, since it is larger than the sum of its proper divisors (3833187271).

640142246201 is a wasteful number, since it uses less digits than its factorization.

640142246201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3833187270.

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 640142246201 its reverse (102642241046), we get a palindrome (742784487247).

The spelling of 640142246201 in words is "six hundred forty billion, one hundred forty-two million, two hundred forty-six thousand, two hundred one".