643116250352 has 10 divisors (see below), whose sum is σ = 1246037735088. Its totient is φ = 321558125168.

The previous prime is 643116250349. The next prime is 643116250391. The reversal of 643116250352 is 253052611346.

It is a super-2 number, since 2×643116250352² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20097382808 + ... + 20097382839.

Almost surely, 2^643116250352 is an apocalyptic number.

It is an amenable number.

643116250352 is a deficient number, since it is larger than the sum of its proper divisors (602921484736).

643116250352 is a wasteful number, since it uses less digits than its factorization.

643116250352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40194765655 (or 40194765649 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 643116250352 its reverse (253052611346), we get a palindrome (896168861698).

The spelling of 643116250352 in words is "six hundred forty-three billion, one hundred sixteen million, two hundred fifty thousand, three hundred fifty-two".