640653312126424 has 32 divisors (see below), whose sum is σ = 1233526508075520. Its totient is φ = 311808089488896.

The previous prime is 640653312126419. The next prime is 640653312126433. The reversal of 640653312126424 is 424621213356046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5948665809 + ... + 5948773504.

It is an arithmetic number, because the mean of its divisors is an integer number (38547703377360).

Almost surely, 2^{640653312126424} is an apocalyptic number.

It is an amenable number.

640653312126424 is a deficient number, since it is larger than the sum of its proper divisors (592873195949096).

640653312126424 is a wasteful number, since it uses less digits than its factorization.

640653312126424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11897439499 (or 11897439495 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 49.

The spelling of 640653312126424 in words is "six hundred forty trillion, six hundred fifty-three billion, three hundred twelve million, one hundred twenty-six thousand, four hundred twenty-four".