640041532137 has 64 divisors (see below), whose sum is σ = 1095035696640. Its totient is φ = 361918430208.

The previous prime is 640041532063. The next prime is 640041532183. The reversal of 640041532137 is 731235140046.

640041532137 is a `hidden beast` number, since 640 + 0 + 4 + 1 + 5 + 3 + 2 + 1 + 3 + 7 = 666.

640041532137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 640041532137 - 2⁸ = 640041531881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640041532187) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8169093 + ... + 8247069.

It is an arithmetic number, because the mean of its divisors is an integer number (17109932760).

Almost surely, 2^640041532137 is an apocalyptic number.

It is an amenable number.

640041532137 is a deficient number, since it is larger than the sum of its proper divisors (454994164503).

640041532137 is a wasteful number, since it uses less digits than its factorization.

640041532137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78447 (or 78441 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 640041532137 in words is "six hundred forty billion, forty-one million, five hundred thirty-two thousand, one hundred thirty-seven".