640050342146 has 4 divisors (see below), whose sum is σ = 960075513222. Its totient is φ = 320025171072.

The previous prime is 640050342101. The next prime is 640050342179. The reversal of 640050342146 is 641243050046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 638808555025 + 1241787121 = 799255^2 + 35239^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160012585535 + ... + 160012585538.

Almost surely, 2^640050342146 is an apocalyptic number.

640050342146 is a deficient number, since it is larger than the sum of its proper divisors (320025171076).

640050342146 is a wasteful number, since it uses less digits than its factorization.

640050342146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320025171075.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 640050342146 in words is "six hundred forty billion, fifty million, three hundred forty-two thousand, one hundred forty-six".