640511213124512 has 48 divisors (see below), whose sum is σ = 1270560733045632. Its totient is φ = 317830409909760.

The previous prime is 640511213124509. The next prime is 640511213124527. The reversal of 640511213124512 is 215421312115046.

It is a super-2 number, since 2×640511213124512² (a number of 30 digits) contains 22 as substring.

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, 4200398 + ... + 36037005.

It is an arithmetic number, because the mean of its divisors is an integer number (26470015271784).

Almost surely, 2^{640511213124512} is an apocalyptic number.

It is an amenable number.

640511213124512 is a deficient number, since it is larger than the sum of its proper divisors (630049519921120).

640511213124512 is a wasteful number, since it uses less digits than its factorization.

640511213124512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40241181 (or 40241173 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

Adding to 640511213124512 its reverse (215421312115046), we get a palindrome (855932525239558).

The spelling of 640511213124512 in words is "six hundred forty trillion, five hundred eleven billion, two hundred thirteen million, one hundred twenty-four thousand, five hundred twelve".