640215032141 has 16 divisors (see below), whose sum is σ = 699834401280. Its totient is φ = 583040778240.

The previous prime is 640215032113. The next prime is 640215032153. The reversal of 640215032141 is 141230512046.

It is not a de Polignac number, because 640215032141 - 2⁶ = 640215032077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640215032161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4106270 + ... + 4259328.

It is an arithmetic number, because the mean of its divisors is an integer number (43739650080).

Almost surely, 2^640215032141 is an apocalyptic number.

It is an amenable number.

640215032141 is a deficient number, since it is larger than the sum of its proper divisors (59619369139).

640215032141 is a wasteful number, since it uses less digits than its factorization.

640215032141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161044.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 640215032141 its reverse (141230512046), we get a palindrome (781445544187).

The spelling of 640215032141 in words is "six hundred forty billion, two hundred fifteen million, thirty-two thousand, one hundred forty-one".