640038418143 has 8 divisors (see below), whose sum is σ = 853572174000. Its totient is φ = 426598470528.

The previous prime is 640038418133. The next prime is 640038418147. The reversal of 640038418143 is 341814830046.

640038418143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 640038418143 - 2³⁴ = 622858548959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640038418095 and 640038418104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640038418147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23436138 + ... + 23463431.

It is an arithmetic number, because the mean of its divisors is an integer number (106696521750).

Almost surely, 2^640038418143 is an apocalyptic number.

640038418143 is a deficient number, since it is larger than the sum of its proper divisors (213533755857).

640038418143 is a wasteful number, since it uses less digits than its factorization.

640038418143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46904121.

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 640038418143 in words is "six hundred forty billion, thirty-eight million, four hundred eighteen thousand, one hundred forty-three".