643027612626 has 96 divisors (see below), whose sum is σ = 1609717494528. Its totient is φ = 181711555200.

The previous prime is 643027612597. The next prime is 643027612651. The reversal of 643027612626 is 626216720346.

643027612626 is a `hidden beast` number, since 6 + 4 + 3 + 0 + 2 + 7 + 6 + 12 + 626 = 666.

It is a super-2 number, since 2×643027612626² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12279916 + ... + 12332168.

It is an arithmetic number, because the mean of its divisors is an integer number (16767890568).

Almost surely, 2^643027612626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643027612626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804858747264).

643027612626 is an abundant number, since it is smaller than the sum of its proper divisors (966689881902).

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

643027612626 is a wasteful number, since it uses less digits than its factorization.

643027612626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53336 (or 53333 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 643027612626 in words is "six hundred forty-three billion, twenty-seven million, six hundred twelve thousand, six hundred twenty-six".