1640650341508 has 24 divisors (see below), whose sum is σ = 2941241879520. Its totient is φ = 800296553280.

The previous prime is 1640650341497. The next prime is 1640650341521. The reversal of 1640650341508 is 8051430560461.

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, 7661923 + ... + 7873141.

It is an arithmetic number, because the mean of its divisors is an integer number (122551744980).

Almost surely, 2^{1640650341508} is an apocalyptic number.

It is an amenable number.

1640650341508 is a deficient number, since it is larger than the sum of its proper divisors (1300591538012).

1640650341508 is a wasteful number, since it uses less digits than its factorization.

1640650341508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258627 (or 258625 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 1640650341508 in words is "one trillion, six hundred forty billion, six hundred fifty million, three hundred forty-one thousand, five hundred eight".