640024520124043 has 4 divisors (see below), whose sum is σ = 640024729437280. Its totient is φ = 640024310810808.

The previous prime is 640024520123993. The next prime is 640024520124131. The reversal of 640024520124043 is 340421025420046.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640024520124043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 640024520123993 and 640024520124011.

It is not an unprimeable number, because it can be changed into a prime (640024520125043) 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, 100000980 + ... + 106208497.

It is an arithmetic number, because the mean of its divisors is an integer number (160006182359320).

Almost surely, 2^{640024520124043} is an apocalyptic number.

640024520124043 is a deficient number, since it is larger than the sum of its proper divisors (209313237).

640024520124043 is a wasteful number, since it uses less digits than its factorization.

640024520124043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209313236.

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 640024520124043 its reverse (340421025420046), we get a palindrome (980445545544089).

The spelling of 640024520124043 in words is "six hundred forty trillion, twenty-four billion, five hundred twenty million, one hundred twenty-four thousand, forty-three".