643060022452550 has 24 divisors (see below), whose sum is σ = 1216364381458200. Its totient is φ = 252864280014080.

The previous prime is 643060022452501. The next prime is 643060022452579. The reversal of 643060022452550 is 55254220060346.

It is a super-2 number, since 2×643060022452550² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108993221195 + ... + 108993227094.

It is an arithmetic number, because the mean of its divisors is an integer number (50681849227425).

Almost surely, 2^{643060022452550} is an apocalyptic number.

643060022452550 is a deficient number, since it is larger than the sum of its proper divisors (573304359005650).

643060022452550 is a wasteful number, since it uses less digits than its factorization.

643060022452550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217986448360 (or 217986448355 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 44.

The spelling of 643060022452550 in words is "six hundred forty-three trillion, sixty billion, twenty-two million, four hundred fifty-two thousand, five hundred fifty".