640007636332 has 12 divisors (see below), whose sum is σ = 1121028795936. Its totient is φ = 319713694640.

The previous prime is 640007636269. The next prime is 640007636347. The reversal of 640007636332 is 233636700046.

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, 72525919 + ... + 72534742.

It is an arithmetic number, because the mean of its divisors is an integer number (93419066328).

Almost surely, 2^640007636332 is an apocalyptic number.

It is an amenable number.

640007636332 is a deficient number, since it is larger than the sum of its proper divisors (481021159604).

640007636332 is a wasteful number, since it uses less digits than its factorization.

640007636332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145061768 (or 145061766 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 40.

The spelling of 640007636332 in words is "six hundred forty billion, seven million, six hundred thirty-six thousand, three hundred thirty-two".