640382435542 has 8 divisors (see below), whose sum is σ = 960778962000. Its totient is φ = 320122781544.

The previous prime is 640382435519. The next prime is 640382435587. The reversal of 640382435542 is 245534283046.

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

It is a junction number, because it is equal to n+sod(n) for n = 640382435492 and 640382435501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34206417 + ... + 34225132.

It is an arithmetic number, because the mean of its divisors is an integer number (120097370250).

Almost surely, 2^640382435542 is an apocalyptic number.

640382435542 is a deficient number, since it is larger than the sum of its proper divisors (320396526458).

640382435542 is a wasteful number, since it uses less digits than its factorization.

640382435542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68436230.

The product of its (nonzero) digits is 2764800, while the sum is 46.

The spelling of 640382435542 in words is "six hundred forty billion, three hundred eighty-two million, four hundred thirty-five thousand, five hundred forty-two".