643310413512 has 64 divisors (see below), whose sum is σ = 1734094750080. Its totient is φ = 197701074432.

The previous prime is 643310413507. The next prime is 643310413553. The reversal of 643310413512 is 215314013346.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 995893 + ... + 1509444.

It is an arithmetic number, because the mean of its divisors is an integer number (27095230470).

Almost surely, 2^643310413512 is an apocalyptic number.

It is an amenable number.

643310413512 is an abundant number, since it is smaller than the sum of its proper divisors (1090784336568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643310413512 is a wasteful number, since it uses less digits than its factorization.

643310413512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506182 (or 2506178 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 643310413512 its reverse (215314013346), we get a palindrome (858624426858).

The spelling of 643310413512 in words is "six hundred forty-three billion, three hundred ten million, four hundred thirteen thousand, five hundred twelve".